Connection: Bluetooth 4.1 Distance: Up to 10m in open area Frequency: 20 Hz - 20 kHz Sensitivity: 96 ±3 dB Charching interface: Micro-USB female Charging adapter output: DC 5V Charging time: 1 hour, playing time: 3 hours, standby time: 6 days Battery: Rechargeable 60 mAh lithium-polymer battery LED indicator: Blue-red Cable length: 740 mm Includes USB charging cable, ac adapter sold seperately.