earldom bass pure wireless headset bts 5.3 b07 (9716)

Wireless version: V5.3 Support configuration files: A2DP, AVCTP, AVDTP, AVRCP, HFP, SPP, SMP, ATT, GAP, GATT, RFCOMM, SDP, L2CAP Operating distance: 10 meters Transmission power : Level 2 Frequency range: 2.402-2.480GHz Impedance: 32 ohms Supported TF cards: 128M-32G RF range: 87.5-108MHz Rechargeable lithium battery: 350mAh Time Music playback: 6 hours Talk time: 6 hours Charging time: 2 hours