The Kunhe 365nm purple light rechargeable penlight is lightweight and portable, measuring approximately 5.71 inches (145 mm) long and weighing only 1.52 ounces (43 grams). Its single-mode illumination ensures ready access and is simple to operate and easy to use. A durable steel pocket clip securely attaches it to your shirt or tool bag, while its IPX4 waterproof rating ensures reliable performance even in rain or splashes. This compact penlight is ideal for air conditioner repairers detecting air leaks, law enforcement officers inspecting driver's licenses, official ID cards, and passports, and can also be used to detect pet urine stains, scorpions, and many other applications.