Fit of Earphones: In-Ear Particulars: Lightning Wireless Link Wireless Transmission Range: ≥ 10 m, Version: 5.1 5V-1A is the input. 300mAh, 3.7V battery 1.11 WH 30 mAh is the battery's capacity. Case for Charging 300mAh battery capacity for roughly 3.5 hours of music playback Talking Time: roughly three hours Wireless Two hours for charging One-hour USB charging time Just the standby time: 720 hours