Bone conduction technology Intelligent power saving Adaptive noise reduction Handheld music, no need to wear White noise chip: 5.0 Function chip: 20HZ-20KZ full range output Sound channel: built-in special customized bone conduction transducer Output power: 3W audio output Transmission distance: ≥ 10m (barrier-free) Audio decoding: support MP3//AAC/WAV, etc Bone conduction transducer: built-in enhancement chip and high-performance coil Charging interface: Type-C interface 5V0.4 charging current Built-in battery: polymer lithium battery 500mAh Colour:White Material:plastic Package Contents: 1 x Bone Conduction Speaker 1 x USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.