Technical specifications: This product has a rated battery capacity of 600mAh and can be cycled more than 500 times. The screen displays the charging status during charging and shows \"Fully Charged\" when fully charged. This product requires the use of the Shining Mask mobile application. It uses high-efficiency, high-brightness LED beads. Press the power button, then cover the sensor switch with your hand. When the screen displays \"OK\", you can use gestures to switch the screen display. Product information: Product name: Shining Mask; Number of LED beads: 234; Pixel density: 46 x 58 (irregular); Material: Plastic; Colour: Black; Package contents: 1 x LED light. Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the actual product. Measurement error is +/- 1-3 cm.