Product detailsPackage included:
1X Hands-free Headphone

Features:
1.Compatible for the most telephones in call center
2.Headset head can freely telescopic, moderate elasticity, comfortable to wear.
3.Super ear cushion, make sure to wear comfortable.
4.High durability, fully adapt to 7X24 hours for high frequency.
5.CID of FSK/DTMF.
6.Volume adjustment, noise-canceling.

Specification:
1.Microphone type:electret condenser microphone(ECM)
2.Microphone sensitivity:40db3db
3.Microphone voltage:2.0v
4.Receiver impedance:15010

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