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 for clear reading of measurement data. Includes a bracket on the back for convenient placement. Multifunctional design suitable for household, daily use, and travel. Functions include ultraviolet level detection, protection level early warning, ultraviolet radiation dose detection, outdoor sunlight detection, and indoor lamp inspection. 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: 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 error: less than 15% Sampling speed: less than 3 seconds Detection range: 0–3000 µW/cm² Standby time: 2–3 hours Display type: Digital display Display principle: LCD display Detection principle: Lighting analysis and detection Technology: Sensor technology 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