2.5mm Binaural Headset, AGPtek Hands-free Call Center Headphone for Desk & Most Cordless Phones with Noise Canceling Mic + 3.5MM QD + Volume Mute

Description: AGPtek 2.5mm Binaural Telephone Headset is a headset designed for call center. Users will have comfortable wearing experience. Features / unction characteristics: Hands-free 2.5mm Headset High clear voice communication Compatible for most telephones in call center 150ohms speaker to ensure perfect voice quality Headset head can freely telescopic, moderate elasticity, comfortable to wear Super soft ear cushions make sure comfortable wearing High durability, fully adapt to 7 x 24 hours for high frequency Specification: Color: Black Microphone type: electrical condenser microphone(ECM) Microphone sensitivity: 40db??3db Microphone voltage: 2.0v Receiver impedance: 150??10 ohm Size: 10*5*8?¡§cm?? Package: 1 * 2.5mm Binaural Headset 1 * User manualCOMPATIBLE MODELS: Plantronics, Jabra, HUAWEI, Siemens, Philips, Kono, AVAYA1408? AVAYA1416?AVAYA4610SW?AVAYA4620SW?AVAYA2420 & AVAYA6408D How To Use: Plug the adapter (the headset comes with it) into the phone RJ9 port, then plug the headset into the adapter. There is a line sequence switch on the adapter (it has the numbers 1 - 8). Note? MAKE SURE TO TRY EACH OF THE 8 "CHANNELS"** until you find the one where you can hear them and they can hear you Pay attention to Mute Button: In the call, press this button to prohibit the microphone to speak, speak to press the button to go back to normal again.