– Bluetooth version: V4.0
– Supporting protocol：HSP、HFP、A2DP、 AVRCP
– Connecting distance：10 meters
– Battery capacity：1400mAh rechargeable battery
– Working time：35 hours
– Standby time：about 800 hours
– Charging time：about 3hours
– Charging input：DC 5.0V=500mA
– Frequency response：20Hz-20kHz
– sensitivity（SPL）: 100dB
– rated impedance：32 Ω.
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