1、Real Time Measurement Mode: You can measure the distance between wall and other surfaces anytime and anywhere, with high measurement accuracy 2、Memory Clear Function: You can quickly delete all stored measurement values for the next measurement 3、Error 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 4、Portable and Durable: Made of high quality ABS, light weight and durable, small size, can be placed in a pocket, easy to carry 5、Wide Range of Applications: Very suitable for indoor and outdoor measurement, building measurement, woodworking measurement, interior decoration, etc. 1 x Rangefinder(battery not included)1 x English Manual Item Type: RangefinderProduct Size: Approx. 12 x 6cm / 4.72 x 4.26inWeight: Appeox. 106g / 3.74ozBattery Parameters: 1 x 9V battery (battery not included)Measuring Range: 0.5~18m / 19.69~ 708.66inAccuracy: 0.005mmWorking Voltage: 9VScope of Application: measurementUnit of Measurement: feet/meterFrequency: 40 kHz Laser Beam Wattage: 1mW Wavelength: 650nmWorking Temperature: 0 to 43℃Automatic Shutdown: Shutdown when no key is pressed within 4 minutes