Feature: 1. High Quality: The UVB tester is protected on the outside by a rubber cover, which improves the durability of the product and ensures a long service life. 2. Accurate Reading: The UVB tester uses high quality sensor, no stray light influence, measurement accuracy in 10%, response time is less than 0.5s, you can quickly get the required accurate reading, the measurement error is small. 3. Easy to Operate: UVB emitter is one-touch switch, and has clear digital display screen, intuitive user interface and clear digital display, often suitable for people looking for an easy and accurate way to measure UV radiation. 4. Wide Applicability The UVB tester is widely used for daily UVB testing of various reptile lamps, for example: lizards, snakes, systems, turtles and other reptiles, and can effectively help you choose the best angle and position for your own light bulb. 5. Portability: UVB tester is also lightweight and portable, so you can take it with you anywhere and measure and master the data at any time. Specification: Certification: NONE Origin: Mainland China Reponse Range: 280-315nm Measurement interval: 0-1999W/cm2 Resolution: 1W/cm2 Response time: T0.5s Measurement accuracy: 10% Power supply: DC3V (2*AA batteries required) Operating power consumption: 0.25W Screen size: 2 inches Probe material: UV glass Product size: approx. 165*75*30 mm/6.4*2.9*1.1inch Usage advice. Before measuring the UV lamp, make sure you take the necessary precautions and wear UV-protective glasses as a preference. Please preheat the UV lamp for at least 5 minutes. To improve the accuracy of the measurement data, the average of multiple measurements can be used to reduce errors. Please keep the photographic sensor clean. If cleaning is required, wipe with alcohol and cotton wool. Do not use sharp objects to clean the sensor to prevent damage to the front filter. Operating instructions: Aim the sensor probe above the irradiometer at the UV light source and press the button on the front to read the light intensity value on the LCD. Note down the distance between the point and the UV light source, after many measurements over a long period of time, the UV light source decay process can be derived, after the light intensity decay to about 70%, replace the UV light source to ensure the irradiation intensity. This product uses 3V DC power supply, you need to provide your own two AA batteries, if not used for a long time, please take out the batteries to avoid leakage of liquid to damage the irradiometer. 1 PCS*UVB Tester