<p>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.</p> <p>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.</p> <p>Don't disturb the person next to your pillow:Vibration playback exclusive music, watching short videos, listening to music, will not disturb the pillow.</p> <p>Light weight:Slim and lightweight design, flat shape, easy to put in your pocket, convenient to carry.</p> <p>Multiple playback modes:Support Bluetooth playback, comes with TF card slot, supports up to 128GB TF card playback.</p> <p>Timer shutdown:Automatic timer shutdown after 60min, easy to set, no need to get up to operate, sleep until dawn.</p> <p>Powerful 8h battery life:300mah rechargeable lithium polymer battery, fast charging, long battery life.</p> <p>Product name: Bluetooth bone conduction music box (TF models)</p> <p>Charging voltage: 5V\/300mA</p> <p>Operating voltage: 3.7\/4.2V</p> <p>Battery capacity: 300mAh</p> <p>Bluetooth version: 5.4</p> <p>Bluetooth distance: 10m</p> <p>Charging interface: Type-C</p> <p>Charging time: 2 hours</p> <p>Playback time: 8 hours</p> <p>Colour:Gray</p> <p>Material:plastic</p> <p>Package Contents:</p> <p>1 x bone conduction sleep monitor</p> <p>1 x USB cable</p> <p>Only the above package content, other products are not included.</p> <p>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.</p>