Technical characteristics: The rated capacity of this product is 2000mAh battery, capable of up to 500 cycles or more. The screen displays the charging status during charging, and shows "full" when charging is complete. This product needs to be used with a mobile phone app (compatible with a certain brand). It features high power, high brightness, and lamp beads. Press the power button, then cover the sensor switch with your hand; when "OK" appears on the screen, you can use gestures to change the display image. Product Information: Product Name: Compatible Mask LED lamp beads: 2074pcs Pixels: 46 x 58 (irregular) Material: plastic Color: black Package Contents: 1 x Mask 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 to differ slightly from the actual item. The measurement allowed error is +/- 1-3cm.