Powerhobby RC2 Digital Laser Infrared Temperature Thermometer A highly useful non-contact tool specially designed for use with R/C engines, motors, battery packs, battery chargers, electronic speed controllers, as well as hundreds of other applications. To use, simply aim the infrared thermometer at the target and press the measurement button to quickly and easily display the surface temperatures. Specs: Temperature Range: - 50°C~260°C/ -58°F - 500°F Accuracy: ±2% or 2°C Distance Spot Ratio: 1:01 Emissivity: 0.95 Response Time & Wavelength: 500ms&(8-14um) Storage Tem: -20°C--50°C ( -4°F-122°F ) Operationg Tem: 0°C--50°C ( 32°F- 122°F ) Repeatability: ±1% or ±1°C Resolution: 0.1°C or 0.1°F Working environment: 10%-95RH noncondensing Recommend measuring distance: 20mm-130mm Power source: 2 pcs AAA battery(1.5V each) Included Product size: 3.74 x 1.57 x 0.78 in.