Description: 【Efficient Detection】: Equipped with a powerful 3W light and a 365nm wavelength, this device  is multipurpose use 【Material】: This Handheld Fluorescence Testor Pen is made from ABS,  ensuring both lightweight and sturdy, Its waterproof design ensures reliable performance in different environments 【Portable & Lightweight】: Compact design  Handheld Fluorescence Flashlight, making it easy to carry for both outdoor and home use 【Suitable for】: Whether you're indoor outdoor, this Handheld Detector is an essential companion for  fluorescence detection, currency verification 【 Package】: Includes a fluorescence detection pen ans USB cable that meets needs for a reliable and efficient detection  Specification: Power 3W Wavelength 365mm Battery capacity 400mAh Power input DC 5V/1.0A time 1 hour Battery life 90 minutes Size Chart: 11cmx2.1cm/4.33inchx0.83inch Package Includes: 1 Fluorescence Tester 1 USB Cable Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.