Features: Use fine quality sensor, no stray light effect. Simple to use: open the front conservation buckle, just need to align the luminaire at a certain distance, press the button to get the UVB radiation value. Comes with a rubber casing, more suitable for instrument conservation. LCD display, high accuracy, small measurement error. Widely used for daily UVB testing of all types of reptile lamps, effectively helping you choose the best angle and distance of your own bulb. Specifications: Material: ABS Irradiance Range: 0-1999UW/cm Response: 280-320nm Resolution: 1UW/cm Accuracy: 10% Peak Spectrum: p=300nm Response Time: T0.5s Built-in Power Supply: DC3V Operating Power Consumption: 0.25W Screen Size: 2 inches Probe Material: UV glass Item Size: 165 * 75 * 30mm / 6.49 * 2.95 * 1.18in Item Weight: 125g / 4.41oz Package Weight: 240g / 8.46oz Package Size: 20 * 11 * 4cm / 7.87 * 4.33 * 1.57in Package List: 1 * UVB Meter 2 * AA Batteries 1 * User Manual (English)