HD Sound with Super Extra Bass, Easy to Operate with Touch Control, Excellent Compatibility with BT5.0, Playtime: Approximately 4 Hours, Hands-Free Calling, Low-latency technology with 3D sound effects, enjoy playing as if you are on the scene of the game, Battery Capacity: Earphone 30mAh Charging Bin 400mAh, Horn Diameter: 10mm, Speaker Sensitivity: 98dB, Frequency Response Range: 20-20KHz, Distance: 10m Barrier-free