... Bluetooth 2.1+EDR2, Music playback time is up to 8-10 hours3, Support A2DP and AVRCP profile4, Excellent audio quality ... all of Bluetooth audio device7, Dimensions 80mm x 42 mm8, Ultra-simple style design9, Hidden key design10, Aluminum case design, top ... -20KHzLoudspeaker Output :3WSignal-To-Noise :≥75dBDistortion :≤1.0% Playback Time :8 ~10 hoursCharging Time :3 to 4 hours Dimension (L×W ...