• Unique Ergonomic Design, • Fast Pairing to making calls and listening to music • Suitable for all Android and iOS devices. • Automatic connection when the cover is open. • Touch Operation. • Dustproof. • ENC Technology reduce more voice. • Double click to start and stop. • Best Battery Backup Battery Capacity 500mAh/3.7V -Charging Box • 40mAh/3.7V -Earphone • Charging 1-2 hours. Country Origin China