1 Piece Lens Sunglasses Mp3 With Bluetooth Design

Model number: ultra k3-a bluetooth version: bluetooth 4.1, class 2. frequency range: 2.402 ~ 2.480ghz bluetooth profiles: a2dp, avrcp, headset. operating distance: 10m (33ft) battery: built-in 3.7v / 70mah li-ion polymer rechargeable battery music playing time: 4 ~ 5 hours talk time: 4 hours charge voltage: 4 hours charge time: 1 hour charging port: micro usb port. color: black main item size: 14.5 x 15.0 x 5.0cm / 11.0 x 7.87 x 3.93in main item weight: 24g