Bluetooth Version: V5.0, class II Chipset: RTK8763BFR Bluetooth Profile: HFPv1.7 HSPv1.2 A2DPv1.3 AVRCPv1.6, SPP1.2 Bluetooth Range: about 10M Music Time: About 6H Talking Time: About 6H Charging Time: 1.5H Charging Type: 3.7V, 50mAh rechargeable lithium polymer battery Operating Temperature: -10-55°C Frequency Range: 2.402-2.480GHZ Overall Dimensions: 60mm*32mm*46.5mm Net Weight: 4.6*2g Charging case: 500mAh rechargeable lithium polymer battery Speaker size: 8mm Automatically connected Touch Control