1.Emitter: 3 high-powered white LEDs , 1 UVLED(365nm) 2.Driver: boost driver 3.Battery Option: 1x21700 battery 4.Working Voltage: 3.0V-4.2V 5.Mode Operation: dual switchs 6.Material: AL6061-T6 aluminium alloy 7.Size: 31.5mm*114.9mm 8.Weight: 86g(without battery) 9.Reverse polarity protection from improper battery installation. 10.The temperature protection system activates automatically if the temperature exceeds 55oC. This system reduces the output current to maintain an optimal outer temperature.ensuring a better using experience General Operation While UV mode is active, the blue indicator light on the button remains on. While long pressing, pressing again within 1.5 seconds will reverse the direction (e.g., brighter -dimmer).Pressing after 1.5 seconds will continue in the same direction.When maximum brightness is reached,the light will flash once to indicate the peak level. Lock/Unlock Function: When the flashlight is off, click the white light button 4 times to lock, and 4 times again to unlock. In lock mode, any button press (except the 4-click unlock sequence) will trigger two fashes to indicate that the flashlight is locked. Battery Level indicator After turning on the SR23, the indicator will display the voltage for 5 seconds. Solid Green=75%-100% Flashing Green=50%-75% Solid Red=25%-50% Flashing Red=1-25% Light Indicator When Charging Red = Charging Green = Fully Charged SR23 offers a USB type-C charging port for convenient charging. Please connect it with the included charging cable and use a power adapter (not included) with 5 V/2 A (max) output. .