- The device is not water-proof, please against any liquid so that will protect the device.
- Please keep it out of small children’s reach, and stock against humidity and hot temperature.
- Please remove the electronic parts from the helmet when the device would be detached.
- Please do not disassemble, amend or alter the device alone, and do not throw and drop it.
- No naked flame sources, such as lighted candles, should be placed on the apparatus.
- Please make sure the charging time is about 2 hours at the same time.