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Item#: N82E16826153020

RAZER Lachesis Phantom White 9 Buttons 1 x Wheel USB Wired Laser 4000 dpi Gaming Mouse

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  • 9 Buttons 1 x Wheel
  • USB Wired
  • Laser

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the RAZER Lachesis

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years
  • Read full details

Customer Reviews of the RAZER Lachesis

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  • Scott A.
  • 7/3/2012 7:06:22 PM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsAwesome of course

Pros: Have had this mouse for 3 years now, it's still working awesome! I'll probably upgrade to the 5600 version or the new Taipan soon.

Cons: None.

Other Thoughts: It sputters a bit sometimes, but I know it's the mat I'm using.

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  • Robert J.
  • 4/2/2010 8:42:23 PM
  • Ownership: 1 week to 1 month

3 out of 5 eggsBetter than Logitech 518

Pros: Buttons 9 of them and all of them can be configured anyway you like.
Texture of plastic is rubber like which gives a secure feeling while gaming.
Wide buttons go edge to edge. I could not stand the Logitech 518 way too narrow and slippery

Cons: Double click speed changes with DPI settings. At high DPI 2000 and up it is difficult to double click. The double click speed settings are global so if you slow it down at 2000 it will be even slower at 400 dpi. At 2000 dpi I had to turn the slider to the slowest double click speed and it still was not easy. Many mis clicks
Documentation - Lacking, no explanation of which settings would be better. If you set it at high dpi it has a windows speed slider which slows it down. So is it better to have it on 3000 dpi and the slider to slow or just set it at 500 dpi and have the slider at high.
Size - I still think its too small and too low. The back could be raised 1/4 inch so you palm can at least touch it.

Other Thoughts: I wonder which is better the Razer Infrared high DPI or this laser sensor. They make both but dont explain the pros and cons.
They need to have more shapes with 9 buttons. This is the only one. The Deathadder only has 5.
If I purchased again I might try the Razer Imperator, it has 7 buttons and looks to be taller.
I don't have large hands I think they need to make their mice just a bit larger and wider. Using three fingers is still cramped but not nearly as bad as the Logitech 518.

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  • Jaime G.
  • 2/5/2010 10:13:08 PM
  • Ownership: more than 1 year

3 out of 5 eggsmouse with a ghost

Pros: Accurate, great features!

Cons: the pointer icon creeps and moves on its own at times. it seems to be very sensitive to what type surface you place the mouse on. I put sheet of paper under it and this very annoying control problem stops.

Other Thoughts: Razer, please fix this control issue! VERY ANNOYING!

0 out of 2 people found this review helpful. Did you? Yes No

  • Tim O.
  • 1/31/2010 11:16:47 PM
  • Ownership: 1 day to 1 week

4 out of 5 eggsNeeds Work

Pros: The mouse is fast, precise, and absolutely great for FPS games. It looks great, and feels great in the hands. I have no idea why people are having problems gripping this mouse if you are a previous razer user.

I have ordered a razer laser mouse pad to help combat the issues of every typical laser mouse.

Cons: The mouse has jitter problems. I don't have the random jumping due to me updating and using the correct firmware. Although, if i move the mouse slightly back and forth it will fade up and left. Clicking also causes the mouse to move slightly and is a pain when accidentally closing tabs or clicking the wrong program ect.

It's also not very good for RTS games.

This is not a mouse for those switching from traditional windows mice or switching from Logitech.

Other Thoughts: I have been using razer products for over 7 years. I own 2 razer diamondbacks and a lycosa keyboard. This mouse is a LASER mouse not an OPTICAL mouse. There is a huge difference between the two. Please stop comparing it to your favorite optical logitech mouse.

If you have used long sleek mice in your life. Go with razer, if you have used fat stubby mice in your life go with logitech. They both create ground breaking mice.

Laser mice is not for everyone.

It is a very accurate and very precise machine not for the tiny movements you are probably accustomed too, unless you use a high sensitivity please refrain from using any mouse over a 2k DPI or laser sensors.

Also, Do not use a cloth pad with any laser style product mice. Try using a hard surface such as a desk top or a metal mouse pad.

2 out of 5 people found this review helpful. Did you? Yes No

  • Alexander A.
  • 1/22/2010 10:55:00 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsNot for Windows 7

Pros: I like the mouse, I like the shape and design. I have had other Razer mouses and that was always my favorite feature. This to me has all the pros of any other Razer mouse.

Cons: The problem people have with this is the pointer kind of creeps when you are not moving the mouse. Razer knows about this problem. By keeping your firmware up to date you will not have this problem. On Razer's website there is a Firmware Updater under the drivers/downloads for this mouse. IT IS NOT WINDOWS 7 COMPATIBLE.

Other Thoughts: This will be a great mouse for me when Razer makes it fully Windows 7 compatible. Windows XP and Vista (32 and 64 bit) works fine with this mouse. So Razer just needs to get with it and release full drivers and firmware updates for 7. If you are running Vista or XP consider this mouse. If you are running 7, WAIT until the website has all the drivers.

2 out of 4 people found this review helpful. Did you? Yes No

  • Barry A.
  • 1/21/2010 1:50:21 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsBad, bad mouse

Pros: Cool packaging, cool software interface, lots of buttons, cool lights

Cons: -Horrible design, most uncomfortable mouse ever
-Price, absolutely insane for how bad this thing is
-WAY too sensitive no matter what I set the DPI to, clicking the mouse moves the cursor, even while holding it 100% in place, still moved it.
-Bad tracking on both of my allsop cloth pads.
-Had to hook the mouse into my XP machine to install the firmware, I know what i'm doing, and tried for 2 hours to install it on windows 7 using all kinds of methods, all failed
-Razer website is totally useless for finding out how to install the firmware for w7, they have a "guide" that tells you absolutely nothing useful. I had to find forums and guides elseware for instructions.

Other Thoughts: It "looks" good both on paper and in reality, but "looks" unfortunately do not make this a good mouse, it is BAD.

0 out of 3 people found this review helpful. Did you? Yes No

  • Robert B.
  • 1/2/2010 9:27:36 AM
  • Ownership: 1 week to 1 month

1 out of 5 eggsWorste Mouse EVER

Pros: Nice fit in hand, smooth movement when it works

Cons: The mouse is uncontrollable. After one day, the mouse 'creeped' and or 'crawled' to the top of my screen uncontrollably, I had to turn the dpi down to the lowest setting to even being to be able to use it on my desktop, which I couldn't begin to try to be able to game with it.
I attempted to contact Razer support, they told me to try everthing that I had done, or to use it without the drivers, making the changeable DPI inoperable, or without other usb devices in my computer, which is my keyboard.
The product is horrible, when it did work in my desktop, it still caused problems in game, and not just one game, different games. I am returning the product and I suggest you think twice about buying this product.

Other Thoughts: If it worked, it would be great. I am in the process of returning the product and I went back to Logitech, bought the G500, cost me less and it works perfect. I had also bought a keyboard from Razer, but because of the horrible customer support/service I am returning that as well and getting a cheap Logitech keyboard. I dont suggest anyone to ever buy a product from Razer, they dont work and they dont care about their customers.

Manufacturer Response:


I apologize about any problems or confusion regarding your Razer Lachesis. Razer values each and every customer and I am sorry you feel differently.

Razer Support would not suggest you always run your Lachesis without the drivers or without other USB devices, they would only suggest you test it that way to see help isolate your problem. (Usually on another computer system is that is possible).

For the problems you describe you want to be sure you have flashed the latest Firmware installed on your unit, you can find that at You may also want to view this FAQ regarding cursor drift


1 out of 1 people found this review helpful. Did you? Yes No

  • Andrew R.
  • 12/29/2009 12:26:13 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsGreat mouse

Pros: Feels comfy after long gaming sessions
Tracking super consistent and reliable
Mouse program is very customizable
Size is perfect for me. I feel the smaller the size I have more control over all the buttons

Cons: I sometimes have to unplug it and plug it in again when I boot up the computer. Really annoying....

One of the tiny top buttons wore out from excessive use.

Other Thoughts: I just reordered this mouse again as a replacement to my old one.

It does not get 5 stars because of the annoying issue I have had where it doesnt work half the time I boot my machine up. Unplugging it and plugging it back in fixes the problem but yea...I shouldnt have to do that.

Also one of the small top buttons wore out.

Over all as far as performance and feel I have not used a finer gaming mouse.

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  • Anonymous
  • 12/2/2009 11:10:09 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsMakes my hand sweat

Pros: Great for Gaming in most cases, the ability to change the button configuration on the fly, and the High DPI ability are great features.

Cons: I use a bunch of mice day in and out, for whatever reason I never feel comfortable using this mouse. I think its the design in how it conforms to my hand. It feels a bit awkward going from more average design mouse to this one. My hand will cramp up from long periods of use and even sweet a great deal, which is just disgusting having to wipe the mouse down to use. This never happens with other mice. Also the pointer will move on its own usually to the top of the screen. I've never had a mouse do that before. I happens out of nowhere, and can be annoying during game play of FPS type games and even normal desktop work. This issue seems less likely under Windows 7 but using Ubuntu 9.10 it happens more often.

Lastly my motherboard thinks the mouse is a keyboard, this might be an issue if you cannot install the drivers for early versions of some operating systems that require a mouse to be present at boot.

Other Thoughts: This is my second review. In my first I stated it took me some time to get used to it. Well I was was wrong. The hand sweating and cramping really negate how I feel about this mouse. I still think RAZER makes good products and may look at a another, as this review is based mostly on my needs as a user. I hear jumping issue is fixed in newer drivers, but as a Linux user I'm left in the cold from applying them directly. I will most likely search for another mouse that has better compatibility and less design faults.

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  • Kyle M.
  • 11/12/2009 8:55:02 PM
  • Ownership: 1 month to 1 year

2 out of 5 eggsoverpriced.

Pros: mouse buttons have a nice feel, has nice styling if not white, typically has good tracking and accuracy.

Cons: side buttons require an insane amount of force to use requiring the buttons go into the side casing a bit, almost as if they assume one is trying to crush the mouse while using it. has tracking errors at very high speed movements. almost guaranteed unwanted mouse movement when picked up. the double click setting in the drivers can cause blue screens of death under windows xp x64. profile switching is either slow or causes mouse to stop responding temporarily. some models have problems with the optical sensor failing. very heavy compared to a razer diamondback.

Other Thoughts: if one likes the razer diamondback weight and feel, stick with a razer diamondback. this mouse attempts to satisfy both people who like mice like the diamondback and people who like bigger mouse, but comes short comparing to a diamondbacks handling. in my opinion the 3g 1800dpi razer mouse sensors are way better than this one.

0 out of 2 people found this review helpful. Did you? Yes No

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Item#: N82E16826153020
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