• Wireless connection Bluetooth 5.0 Communication distance 10 meters Music time: about 4 hours Earphone standby time: about 150 hours Single earphone battery capacity 40 mAh Charging box battery capacity 300 mAh Earphone charging time about 1.5 hours Charging box charging time about 2 hours Net weight about 4.1g is a single earphone. Charging box total net weight is about 35.4g Charging box size is 62 × 40 × 27.2mm Earphone size is 26.65 × 16.4 × 21.6mm