SNDWAY Digital Rangefinder Laser Distance Meter Tape Multi-function Self-Locking Hand Tool Device SW-TM60 Features: 1. Laser digital display, breaking through the limitations of distance measurement 2. Ranging dual mode, measurement data display, coated manganese steel tape, automatic locking function, zero-point magnetic hook, multiple unit switching, front and back reference selection 3. The buckle fits and locks automatically; the self-locking device is easy to use and does not hurt your hands 4. Dustproof and waterproof, tough and strong coated manganese steel tape 5. High-definition backlight digital display, accurate to millimeters 6. Laser continuous measurement, real-time refresh data, suitable for non-planar ranging, continuous scanning real-time distance Specifications: 1. Working Range: 60m 2. Distance measurement precision: +-2mm 3. Measurement unit: Options meter(m), inch(in) and feet(ft) 4. Continuous measurement function: Yes 5. Volume measurement function: Yes 6. Laser level: II 7. Laser Type: 635nm,<1mW 8. Automatically cut off laser: 20s 9. Automatic shutdown: 150s 10. Storage Temperature: -20-60 degree C 11. Working Temperature: -0-40 degree C 12. Storage Humidity: 20%-80%RH 13. Battery: 1.5V 2*AAA (not included) 14. Battery Life: 8000 times for single measurement