Black mirror UV filter: Filter the ambient light to make the purple light more pure. More detection functions: Identify gum injection forgery, jade, amber, beeswax, agate, etc. Five gear position: strong light, medium light, low light, burst flash, SOS. USB mobile power supply: it can be used for emergency chargings of electronic devices such as mobile phones. You can check the freshness of cats every day, point-to-point when you apply medicine, and find the right place to avoids messing with the medicine.