Specifications: Color: Black Size: Approx. 3x3x1.7cm\/1.18x1.18x0.67'' Cable Length: Approx. 45cm\/17.72'' Bluetooth protocol: 4.1 Transmission range: 10 m Support music、 multi-point connection Channel: Stereo Battery Capacity: 80mAH Charging Time: 1-2 hours Protocol: HFP1.6 HSP1.2 A2DP1.2 AVRCP1.4 Voice Prompt: Support     Package Included:   1 x Bluetooth Headset   1 x Charger Cable   4 x Ear Cap