Built-in Bluetooth 2.1 + EDR wireless module.
Bluetooth audio sound, perfect sound quality, and bass effect. About 10M transmission distance. Support phone, iPod, and other devices with Bluetooth function.
Bluetooth hands-free function, answer calls easily. Bluetooth music controlling function.
The built-in rechargeable Li-ion battery lasts for up to about 7 hours per charge.
Rated voltage: DC5V
Frequency scope: 170-15KHz
Power supply: DC 5V Built-in Li-ion battery