https://youtu.be/1s11y9noZm8 ? 【Feature】 E15Ai miniUVflashlight, only 31.8mm in length, can be hung on a keychain or used as an accessory pendant with a necklace, easy to carry Powered by 3 LR44 button batteries Mechanical rotary switch on the head, durable and easy to operate The product can be applied as follows: ◆ Fluorescent agent detection for all kinds of clothing and daily chemical products ◆ Anti-counterfeiting detection, banknote authenticity detection ◆ Fluorescent reflection of special substances ? ? TECHNICAL PARAMETERS: ? LED SPECIFICATIONS: ??? Brand & Model: High?power?UV?LED LED?center wavelength：365nm LED?life span：more than 10,000 hours UV intensity：1572μW/cm2?@15cm，385μW/cm2??@38cm Spot diameter：145mm [...]