MinChen 501B UV LED Flashlight 5 Mode 395-410nm Rechargeable UV Ultraviolet LED Flashlight Torch+2pc Protected 18650 2000mAh Rechargeable Battery and Dual Slot Universal Charger Compared with 365 uv light( invisable), the 395-410nm uv light is visible, the balck light makes those fluorescent substances shine brightly, easy to find substances those eyes hard to find in ordinary light. Works best in dark environment, great for Identified Money, Passport Detection, Textiles Checking, automotive and industrial fluid leaks detection; cracks in antique porcelain/glassware Detecting, night fishing ice lure finding, easy to find carpet stains ,bed bugs, pet urine in the black light, and scorpions catching and so on 5 Modes output brightness: High, Medium, Low, Strobe and SOS; (strong UV output brightness on high mode, if you don't want strong uv light, you can change to Medium output mode or Low output mode by pressing tail cap switch) Powered by1 x 18650 3.7V Rechargeable Li-ion Battery, max output brightness 100LM, each battery's capacity is 2000mAh, total 4000mAh for the black light torch, rechargeable, with protected board, safe,dependable and convenient to use. Batteries charging time:8-10hrs use included Smart charger Universal Smart Charger: The Fungold Charger also can use for charge 10440, 14500, 16340, 17500, 17650...18650 Rechargeable Li-ion batteries. Charging: Red light, Full charged: Green Light.