Is this a mechanical or a membrane keyboard?

This keyboard is not mechanical. It is a decent keyboard for the price, but my opinion is that the keys are a little squishy. I recommend reading a couple of professional reviews before purchasing. It might be worth spending more for the mechanical version.

Direct link to quick start guide PDF?

Hello, Thank you for contacting us in regards to your question. Unfortunately, that is not a question we can answer, but you can contact the manufacturer directly for possible assistance. Their contact information can be found under the 'Warranty & Returns' tab. Website: https://www.corsair.com/ww/en/ Support Phone: 1-888-222-4346 Thank you, Newegg Support

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Main image of CORSAIR K57 RGB Wireless Gaming Keyboard - <1ms response time with Slipstream Wireless - Connect with USB dongle, Bluetooth or wired - Individually Backlit RGB Keys, Black

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CORSAIR K57 RGB Wireless Gaming Keyboard - <1ms response time with Slipstream Wireless - Connect with USB dongle, Bluetooth or wired - Individually Backlit RGB Keys, Black

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Connect with hyper-fast, sub-1ms SLIPSTREAM WIRELESS, low-latency Bluetooth, or USB wired
Light it up anywhere with CAPELLIX LEDs, shining brighter and consuming far less power than conventional RGB LEDs. Choose from 18 different lighting effects wirelessly or plug in for total control of each individually lit key
Six programmable macro keys give you the in-game advantage of powerful macros or key remaps
A detachable, soft rubber palm rest reduces stress on your wrists so you can play longer in comfort
Dedicated volume and multimedia controls give you direct control over your audio without having to interrupt your game
Spend more time gaming and less time charging with up to 175 hours of battery life (up to 35 with RGB lighting)
Powerful CORSAIR iCUE software enables vivid dynamic RGB lighting control, sophisticated macro programming and full-system lighting synchronization across all iCUE-compatible CORSAIR devices
Quiet and responsive keys for comfortable typing

Overview

Specs

Reviews (179)

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Model
Brand	Corsair
Name	K57 RGB WIRELESS
Model	CH-925C015-NA

Keyboard
Keyboard Interface	USB 2.0 or 3.0 Type-A
Design Style	Gaming
Palm Rest	Detachable
Mechanical Keyboard	Yes
Key Switch	Rubber Dome
Keyboard Color	Black
Backlit	Yes
Dimensions	1.38" x 18.90" x 6.53"
Type	Wireless, Wired

Mouse
Mouse Included	No

Wireless
Power Supply	Rechargeable Lithium-Ion
Distance	Up to 33 ft.

OS / System Requirement
System Requirement	PC with a USB 2.0 or 3.0 Type-A port Windows 10, Windows 8.1, or Windows 7 Internet connection for iCUE software download* * iCUE support available via 2.4 GHz wireless and USB wired modes

Features
Features	Game in the Fast Lane: Connect with hyper-fast, sub-1ms SLIPSTREAM WIRELESS, low-latency Bluetooth, or USB wired. LIGHT IT UP: Light it up anywhere with CAPELLIX LEDs, shining brighter and consuming far less power than conventional RGB LEDs - enabling wireless play with full RGB lighting for up to 35 hours (and up to 175 hours without lighting). Choose from 18 different lighting effects wirelessly or plug in for total control of each individually lit key. Six Dedicated Macro Keys: Fully programmable with complex macros and key remaps for an in-game advantage. Detachable Palm Rest: Soft rubber palm rest reduces stress on your wrists so you can play longer in comfort. Dedicated Volume and Multimedia Controls: For direct control over your audio without having to interrupt your game. Powerful CORSAIR iCUE Software: Enables vivid dynamic RGB lighting control, sophisticated macro programming and full-system lighting synchronization across all iCUE-compatible CORSAIR devices. Quiet and Responsive Keys: For comfortable typing during both work and play. Anti-Ghosting with Selective Key Rollover: Your inputs always register in-game even with simultaneous key presses. Windows Key Lock Mode: Ensures you’ll never accidentally interrupt your game at critical moments.

Package Contents
Package Contents	CORSAIR K57 RGB WIRELESS Keyboard, Palm rest, Warranty card, Quick start guide

Additional Information
First Listed on Newegg	August 19, 2019

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Limited Warranty period (parts): 2 years
Limited Warranty period (labor): 2 years
Read full details

Return Policies

Return for refund within: 30 days

Return for replacement within: 30 days

This item is covered by Newegg.com's 30-Day Return Policy. Read full return policy for details.

CORSAIR K57 RGB Wireless Gaming Keyboard - <1ms response time with Slipstream Wireless - Connect with USB dongle, Bluetooth or wired - Individually Backlit RGB Keys, Black

Learn more about the K57 RGB WIRELESS

Customer Reviews of K57 RGB WIRELESS

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Item#: N82E16823816134

CORSAIR K57 RGB Wireless Gaming Keyboard - <1ms response time with Slipstream Wireless - Connect with USB dongle, Bluetooth or wired - Individually Backlit RGB Keys, Black

Learn more about the K57 RGB WIRELESS

Customer Reviews of K57 RGB WIRELESS

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info