Function: music play and hands-free call Bluetooth Version: 5.0 AUX interface with MIC+ Button (for control volume and play) 3.5mm metal plug is detachable Bluetooth Protocol: AVRCP/A2DP/HFP/HSP Support SBC/AAC Do not support APTX Frequency range:2.402GHz-2.480GHz Frequency Response: 20Hz-20kHz Output Power: 28mW, RL=16Ω SNR(Signal to Noise Ratio):＞90dB Mic Sensitivity: -38dB Transmission distance: up to 10m THD ( total harmonic distortion )：<0.1% Battery capacity: 3.7V/180mAh Operating Time: up to 9hours Micro USB for power supply(5V) Products Size:L55xW26xH12(mm)