Specifications:

Bluetooth specification: Bluetooth 4.2 Wireless transmission range: 10M Battery capacity: 1200mAH Built-in voltage: 3.7V Play time: 12 Hours Unit speaker size: 45mmx2 Power: 5Wx2 Consumer Electronics-Portable Audio & Video-Speakers

Large volume of battery,12 hours play time Wireless,bluetooth speaker Portable speaker with belt,outdoor Waterproof Hand-free dial answer call Audio input FM radio Micro SD card U disk direct reading MINI Micro USB Charging Bluetooth caller, hands-free,one-click answer Built-in lithium battery waterproof Music and call,A key switch