Duo wireless earbuds and wireless charging pad - buds charge in compact case. Power/Technology: Power/Technology: Earbud battery: Rechargeable Lithium Polymer battery in each bud: 3.7V; Capacity: 35 mAh; Input: 5V/60 mA; Transmit range: 10m (30 ft); Wireless V 4.1; Charging Case Battery: Rechargeable Lithium Ion battery: 3.7V; Capacity: 300 mAh; Input:5V/250 mA (Micro USB), 4W (Wireless); Wireless Charger: Input: 5V/1.5A; Wireless Output: 5V/0.8A, 5W; Conversion efficiency: ≥63% Wireless Charging Distance: 4mm (0.15"). Compatible with all phones that support wireless charging. Please note, this is not a fast charger. While it will charge devices that support fast charging, it will do so at a standard speed. It is recommended to check your device specifications before purchasing to ensure compatibility. Wireless charging mat operates at a lower temperature than most traditional chargers. Earbuds and charging case must be charged prior to first use; charge time varies by device, minimum 2 hours. Approx. playback time for earbuds: 2.5 hours (Note: Most cases must be removed from phone for wireless charging to work). Includes instructions and USB to Micro USB charging cable. FCC Approved. WARNING: Refer to the item manu(more...).