R&D INSTRUMENTS MT68 Spherical Wood Moisture Tester With Digital Display Alarm 1. High-definition backlit color display, measurement range: 0-100 (relative readings), easy data reading 2. Flashlight design enables precise measurement targeting at night or in low-light environments, ensuring safer and more efficient operation 3. Auto power-off: shuts down automatically after 30 minutes of inactivity 4. Auto-calibration: Press MEAS key upon startup for calibration. During calibration, maintain minimum 100mm distance from any object 5. Measures depths from 5-40mm for effortless internal moisture detection 6. Versatile applications: roof leak detection, wood moisture testing, brick wall moisture inspection, wood flooring moisture assessment, etc Specifications 1. Probe length: 58mm 2. Measurement depth: 5-40mm 3. Measurement range: 00.0-100.0 4. Measurement accuracy: ±2.5% (at 25°C ambient temperature) 5. Alarm method: Indicator light and buzzer alarm 6. Display: 2.4-inch color LCD screen 7. Auto power-off: after 30 minutes of inactivity 8. Operating temperature: 0-45°C 9. Storage temperature: -20-70°C 10. Operating humidity: 0-75% 11. Batteries: 3 AAA batteries (not included) 12. Size: about 20.2 x 5.5 x 2.6cm