-9 led Ultra Violet flashlight black - Color: Black - LED Qty : 9 ultra bright LEDs - Material: Aluminum Alloy - Lens: Coated Glass Lens - Power: 3x AAA battery (not included) - Light bulb type: UV Light - Size:app.9.2cmx2.5cm/3.4''x0.9''(LxD) - Weight: 63g / 1.94oz - Runtime: About 4.5 hours - Switch Type: Clicky/Clickie - Switch Location: Tail-cap - WL(wave length): 385~400nm - Lightbulb/LED Lifespan: 10,000 hours - Switch type: Press on, press off from rear cap - Light weight, compact and easy to carry - Case made of strong and lightweight aluminum - The water resistance design is for use on rainy days - Aluminum body, lightweight With simple waterproof function, but can not be put into the water - Great for checking notes, credit cards, fluorescent inks (invisible inks), cracked glassware, or even crime scene