Description <br> Bluetooth 5.4 mode:Adopting high quality Bluetooth chip, equipped with high performance chip, faster and more stable, low latency and low power consumption, clearer sound. <br> 10 kinds of stress-reducing sleep-aiding sounds:Let you say goodbye to negative emotions, different sound scenarios to make you feel calm and sleep soundly. <br> Dont disturb the person next to your pillow:Vibration playback exclusive music, watching short videos, listening to music, not disturb the pillow. <br> Light weight:Slim and design, flat shape, easy to put in your pocket, convenient to carry. <br> Multiple playback modes:Support Bluetooth playback, comes with TF card slot, supports up to 128GB TF card playback. <br> <br> Timer shutdown:Automatic timer shutdown after 60min, easy to set, no need to get up to operate, sleep until dawn. <br> Powerful 8h battery life:300mah rechargeable lithium polymer battery, fast charging, long battery life. <br> Product name: Bluetooth bone conduction music box (TF models) <br> Charging voltage: 5V/300mA <br> Operating voltage: 3.7/4.2V <br> Battery capacity: 300mAh <br> Bluetooth version: 5.4 <br> Bluetooth distance: 10m <br> Charging interface: Type-C <br> Charging time: 2 hours <br> Playback time: 8 hours <br> Colour:Light Blue <br> Material:plastic <br> <br> Package Contents: <br> 1 x bone conduction sleep monitor <br> 1 x USB cable <br> <br> Only the above package content, other products are not included. <br> 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. <br>