Retevis Walkie Talkie Noise Cancelling Headset 2 Pin, for Retevis RT22 RT21 H-777 RT68 Walkie Talkies, 25dB Dual Mic 2 Way Radio Earpiece with DPS Chipsets Independent Noise Reduction Switch (1 Pack)

* Dual microphone design; there are 2 mic at PTT; earpiece will pick up human speech and background sound at the same time; the clear sound will provided to us after processed * DPS chipsets; the chipsets of earpiece will analyse;process; and filter the sound collected by the two microphones all the time; processing the environmental noise; and providing us with the highest-definition communication * Independent noise cancelling switch; the noise reduction effect is specially set with a switch; it can be temporarily turned off manually if we use it in a quiet environment * 20 hours long working time; a fully charged headset can work continuously for 20 hours; the headset has a built-in 320mAh battery; which can be fully charged in 3 hours through USB charging * Widely applicable; the headset has Kenwood 2 pin connector; it can compatible with most walkie-talkies; like Retevis RT22 RT21 H-777 RT68 etc