◆Bluetooth solutions：REALTEKL8763    ◆Bluetooth version: 5.0+EDR
◆Supported Profile :HSP1.2、HFP1.6、A2DP1.3、AVRCP1.5
◆Battery: 50mAh*2 rechargeable  Lithium battery
◆Working range: 10-15M   ◆Optimum call distance: 6M
◆Talk Time :  6 hours(90% on volume)      Music time: 5 hours (80% on volume)
◆Earphone charging time : about 1.1 hours
◆Speaker size: 8mm  ◆Earphone size : 2.4*1.7*2.4cm
◆Earphone maximum power: 0.3W
◆Weight:                                                                                                                                      Charging box  Specification :                                                                                                                          ◆Charging box battery: 2600mAH   3.7V                                                                                                                                                                    ◆Weight：82g      ◆Charging box size: 7.3*4*3.9cm    
◆Color option: Black ,White