Does this have a single 3/5 mm connector that would fit a phone, or split speaker/mic connectors for a PC?

They are split with the headphone and mic connectors. Pink and green I believe.

Is this headset mac compatible e.g., does it have the tip, two-ring, sleeve plug that fits Mac computers and tablets?

It has two 3-contact plugs and works with MacBook1,1-4,1 and MacBookPro1,1. For use with iPhone you would need a splitter from "4-contact slim plug" to "dual 3-contact socket".

Does this headset have an adjustable volumn control?

It has adjustable volume and a mute switch for the mic.

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Cyber Acoustics AC-401 3.5mm Connector Circumaural Speech Recognition Stereo Headset & Boom Mic

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20Hz-20KHz
3.5mm Connector
7 feet Cord Length

Overview

Specs

Reviews (48)

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This amplified microphone element can be used for speech recognition applications and voice over the Internet.

Model
Brand	Cyber Acoustics
Model	AC-401
Part Number	AC-401

Details
Color	Black

Headphone
Headphone Frequency Response	20Hz-20KHz
Headphone Input Impedance	32 ohm
Connector	3.5mm
Ear Coupling	Circumaural
Cord Length	7 feet
Weight	0.55

Microphone
Microphone Impedance	~2.2K ohm
Microphone Frequency Response	100Hz-16KHz

Features
Features	Voice recognition certified In-line volume and mute control DNCT4: Direct Noise Canceling Microphone Technology Stereo headset Adjustable headband 180 degree microphone Velvet ear pads Adjustable boom arm Ambidextrous design (wear on right or left side).

Additional Information
First Listed on Newegg	May 16, 2006

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Limited Warranty period (parts): 1 year
Limited Warranty period (labor): 1 year
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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.
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Manufacturer Contact Info

Manufacturer Product Page
Manufacturer Website
Support Phone: 1-360-823-4100
Support Website
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Cyber Acoustics AC-401 3.5mm Connector Circumaural Speech Recognition Stereo Headset & Boom Mic

Learn more about the Cyber Acoustics AC-401

Customer Reviews of the Cyber Acoustics AC-401

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Item#: N82E16826275001

Cyber Acoustics AC-401 3.5mm Connector Circumaural Speech Recognition Stereo Headset & Boom Mic

Learn more about the Cyber Acoustics AC-401

Customer Reviews of the Cyber Acoustics AC-401

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info