This is a small, accurate, and portable ultraviolet radiation tester with a wide range of applications. It can detect ultraviolet radiation in real time, ensuring reliable monitoring. Features: Compact and lightweight, easy to use and carry. LCD digital display screen allows clear reading of measurement data. Includes a bracket on the back for convenient placement. A practical multifunctional device for daily household use and travel. Functions include ultraviolet level detection, protection level warning, ultraviolet radiation dose detection, outdoor sunlight detection, and inspection of indoor lamps and other light sources. Suitable for detecting ultraviolet radiation from sunlight, indoor lighting, and UV lamps. Can be used to test and verify the protective effects of anti-ultraviolet products such as car films, curtains, protective clothing, glasses, and other protective items. Dual power supply options: powered via USB interface or 2 x AAA batteries (batteries not included). Specifications: Material: ABS Color: Black Display window: 2.2 inches Working voltage: 5V Wavelength range: 350–380 nm Power source: 2 x AAA battery (not included) Detection accuracy: less than 15% error Sampling speed: under 3 seconds Detection range: 0–3000 µW/cm² Standby time: 2–3 hours Display type: Digital Display principle: LCD Detection principle: Light analysis and detection Technology: Sensor-based application Item size: 127 x 54 x 18 mm / 5.0 x 2.1 x 0.7 in Item weight: 96 g / 3.4 oz Package size: 145 x 58 x 24 mm / 5.7 x 2.3 x 0.9 in Package weight: 81 g / 2.9 oz Packing List: 1 x Ultraviolet Radiation Detector 1 x User Manual