【Mini USB Rechargeable Lanyard Lamp】The mini keychain flashlight uses a Luminus SST20 LED, is made of durable PC materials with stainless steel providing a maximum of 400 lumens, and the 300mAh lithium polymer battery can be fully charged in 35 minutes thanks to the built-in Type-C charging port, making it ready for use again. 【Multiple Light Effects and Memory Function】The main light has five brightness modes: 2Lm/25Lm/87Lm/300Lm/400Lm. The side light has 3 light modes and 3 special light modes: White/White Flash/UV light/Red/Red Flash/Red-Blue Flash. All operations are done with the lamp's single button. The memory function is used to store the last brightness mode you used before turning off the flashlight. 【Various Uses】The flash mode for the red/red-blue LED is ideal as a warning light. It can also be attached to a backpack when walking along streets and is still very visible even in bad weather. The other is a UV light LED. This allows you to check banknotes or ID documents for 90 minutes to your heart's content - and of course, also follow a blood trail if necessary. Performance and operating time: The rechargeable keychain lamp naturally doesn't last long in the highest mode - only 2 hours. However, it can be used in medium/low/ultra-low mode for up to 4-32 hours and when used as an emergency signal/strobe for a full 3 hours. 【Ultra Compact & Dustproof & Waterproof IP65】You can hang one with the keychain on your bag or simply attach it to your keyring or simply integrate it into your survival gear. The keychain, just like the survival watch, is easily forgotten, and you always have it with you automatically when you leave the house. It has protection class IP65, so this little guy can be used in all weather conditions. ➤ When the flashlight is running, try not to touch the metal part of the main lamp head. When the flashlight runs for too long or is used in a strong light mode, the aluminum alloy protective ring on the lamp head heats up, which is a normal phenomenon caused by the absorption of heat energy emitted from the lamp head. When there is a break in use, it cools down quickly and returns to normal operation.