◆Bluetooth solutions：REALTEKL8763    ◆Bluetooth version: 5.0+EDR
◆Supported Profile :HSP1.2、HFP1.6、A2DP1.3、AVRCP1.5
◆Battery: 45mAh*2 rechargeable  Lithium battery
◆Working range: 10-15M   ◆Optimum call distance: 6M
◆Talk Time :  4hours(90% on volume)        Music time: 4hours (80% on volume)
◆Earphone charging time : about 1.5 hours
◆Speaker size: 8mm  ◆Earphone size : 25*14*30mm
◆Earphone maximum power: 0.3W
Charging box  Specification :                                                                                                                          ◆Charging box battery: 650mAH   3.7V                                                                                                                                                                    ◆Weight：51.8g   ◆Charging base: about 2.5hours    ◆Color option: Black , White