Colors: black, white, pink, green (optional) Bluetooth-compatible: Bluetooth-compatible V5.3, high-definition binaural call Product horn: 8mm composite film horn Product chip: Jerry 6983D Standby time: 60 days+ Working time: 5 hours, the charging box can charge the headphones 3 times. Charging time: approximately 45 minutes Communication distance: obstacle free 15 meters Headphone battery capacity: 30mAh Charging box battery capacity: 300mAh Charging interface: Type-C Gross weight: 135g Charging box size: about 43 * 28 * 50mm/1.69 * 1.10 * 1.96inch Packaging size: about 122 * 103 * 45mm/4.80 * 4.05 * 1.77inch