USAMS US-ZB234 wireless tie-clip microphone - an ideal product for people conducting online broadcasts, trainings, classes and meetings. A capacious docking station provides 170 hours of work, on a single charge the wireless microphone lasts up to 8 hours. The built-in ENC active noise reduction system ensures high and clear sound quality.Specification:Material: ABS + PCDimensions: 90 x 63 x 33 mmWeight: 117 g (microphone 6.7 g)Mic sensitivity: -42db - / + 1dbRange: up to 10mMicrophone battery: 55mAhDocking station battery: 1200mAhMicrophone working time: up to 8hMicrophone charging time: up to 2.5 hoursDocking station charging time: 2.5hDocking station input: 5V-1A