Item Type: Rangefinder_x000D_ Product Size: Approx. 12 x 6cm / 4.72 x 4.26in_x000D_ Weight: Appeox. 106g / 3.74oz_x000D_ Battery Parameters: 1 x 9V battery (battery not included)_x000D_ Measuring Range: 0.5~18m / 19.69~708.66in_x000D_ Accuracy: 0.005mm_x000D_ Working Voltage: 9V_x000D_ Scope of Application: measurement_x000D_ Unit of Measurement: feet/meter_x000D_ Frequency: 40 kHz _x000D_ Laser Beam Wattage: 1mW _x000D_ Wavelength: 650nm_x000D_ Working Temperature: 0 to 43_x000D_ Automatic Shutdown: Shutdown when no key is pressed within 4 minutes 1Real Time Measurement Mode: You can measure the distance between wall and other surfaces anytime and anywhere, with high measurement accuracy 2Memory Clear Function: You can quickly delete all stored measurement values for the next measurement 3Error Correction Function: The rangefinder can indicate in time that the measured distance is too long or too short, which is convenient for users to adjust in time 4Portable and Durable: Made of high quality ABS, light weight and durable, small size, can be placed in a pocket, easy to carry 5Wide Range of Applications: Very suitable for indoor and outdoor measurement, building measurement, woodworking measurement, interior decoration, etc.1 xRangefinder(battery not included) 1 x English Manual