Notice1. This product does not contain batteries, comes with usb cable, you need to connect the power to use.2. Do not use a power adapter higher than 5V for charging, such as the fast charger of mobile phone.3. If the power press switch cannot be turned on, perform the operation again or replace the adapter.4. Due to the different monitor and light Aeffect, the actual color of the item might be slightly different from the color showed on the pictures.*The above data are measured by the TOPK laboratory, the actual use will be slightly different depending on the specific