Earphone Fit: In-Ear Specifcation: Lightning Wireless Connection Version: 5.1 Wireless Transmission Distance: ≥ 10 m Input: 5V-1A Battery: 3.7V 300mAh 1.11WH Battery Capacity: 30mAh Charging Case Battery Capacity: 300mAh For Music Time: About 3.5hrs Talking Time: About 3hrs Wireless Charging Time: 2H USB Charging Time: 1H Standby Time only: 720 hrs