Material: Aluminum. Earphone battery: 40 mAh. Power Bank Battery: 2000mAh. Bluetooth Version: 4.1. Bluetooth Profile: A2DP/HFP/HSP/AVRCP. Wireless Range: 32.8 ft. With Power Bank Function. Polymer battery. Capacity: 2000mAh. Input:5V 1A Output:5V 1A. Talk/Play Time(on Earbuds): 120 min