Wireless Version: V4.1 + EDR Support Agreement: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3 Frequency: 2.4GHz Impedance: 32 OHM Transmission: class2 Output power: 30mW Range: 33feet Frequency response: 20-20000Hz Talking Time: 3-4 hours Charging time about 1 hour (power indicator charging: red light; full power: red light off ,blue light on) Standby Time: 120 hours Battery: 60mAh rechargeable Li battery Operating voltage range: 3.0V-4.2V Mitou sensitivity: -42dB Product Size: Length 25MM* Width 15MM*High 35 MM Charging power: DC5V power supply [round hole interface] (computer USB port, mobile phone charger, car charger) Compatible phone: compatible with almost all the Android, Apple, Microsoft, Saipan system with Bluetooth mobile phone Package Content: 1*Bluetooth Headphones 1*USB Charging Cable 1*User Manual
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