Waterproof drop resistance super long power lasting ideal for outdoor measurement; Range: 0.1~70m; Accuracy: +/-2mm; Unit: M / Ft / In; Display: 4 Line dot matrix; Display illumination: Y; History measurement recodes: 20; Audio: Chinese / English data reader; Buzzer indication: Y; Keypad: Plastic + rubber; Battery type: Rechargeable Li-ion; Power of battery: 1200mAh; Battery life: Up to 20000 time; Laser Class: Class 2M II; Laser type; 635 nm < 1mW; Operating Temperature: 0~40'C (-32~104'F); Storage Temperature: -10~60'C (14~140'F); Waterproof: IP67; Auto laser switch-off; After 0.5 second; Auto instrument switch-off after 3mins; Size: 120 x 60 x 28mm; Weight: 165g.