Item Type: Laser Tape Measure Model: SW-TM60 Material: ABS Battery: 2 x 1.5V AAA(not included) Uses: Home ranging, building ranging, industrial ranging Basic Parameters: Maximum Measuring Distance: Approx. 60meter / 196.9ft Distance Measurement Accuracy: ±2mm Accuracy Self Calibration: Yes Continuous Measurement Function: Yes Measurement Unit Selection: M/in/ft Voice Prompt: Yes Laser Type: Class 2 630~670nm, <1mW Automatically Cut Off Laser: 20 Seconds Automatic Shutdown: 150 Seconds 1、BREAK LIMITATION: Laser digital display, breaking through the limitation of ranging. Can be used for household ranging, building ranging, and industrial ranging 2、ACCURATE AND INTUITIVE: High definition backlight digital display, accurate to millimeters; Data observation is more intuitive, avoiding errors that may be caused by visual calibration 3、REAL TIME SCANNING AND REFRESH: Laser continuous measurement with real time refresh data; suitable for non planar distance measurement, continuous scanning real time distance 4、INCREASE STABILITY AND LIGHT INPUT: Dual photoreceptor holes bring significantly improved stability; increased light input in complex environments 5、EASY OPERATION SELF LOCKING: Self locking device is easy to use without hurting your hands. Lock the current position in real time when you pull out, and press the button to retract 1 x Instrument 1 x User Manual 1 x Screwdriver