Precautions for laser use: 1. Laser products need to be used in smoke environment. Our photos are all taken in a smoke environment. 2. Laser products cannot be turned on for a long time. In order to extend the life of the laser, we recommend Green laser: use 1 minute, rest for 30 seconds. Low-pow red light module:It is recommended to use it for no more than 10 minutes. Green laser gloves use for stage and dancing Output power : Green:4pcs*532nm 50mW With rechargerable battery . Work 2~ hours for one time . Glove Size: both bands, size by adjusting the straps. Charging time :2-3 hours