Operating temperature 0 to 40°C Auto power off after about 5 minutes without operation Dust and waterproof performance (*2) IP67 Bluetooth 4.2 Communication distance (*3) 7m Power supply lithium battery CR2032 1 piece (The included battery is for monitors, so its life may be short.) Measurement range (mm): 0.01 to 300 小显示(mm):0.01 仪器差(mm):外部测量:±0.03 深度栏:是