Suaoki D5T BLUETOOTH Enabled Laser Distance Measurer 65.61FT/ 20M, Laser Measure with TOUCHSCREEN Backlit LCD, Continuous Measurement/Pythagorean/Area/Auto Level/Auto Height Measurement Modes HIGH ACCURACY: the laser distance meter is accurate to within 1/12in. (+/- 2 mm) up to 65.61FT /20 meters measuring range and can be mounted in a tripod (not included) for even more accuracy CONVENIENT OPERATION: slide down the switch to power the unit on, choose your measuring options with the convenient LCD touchscreen, press the new designed button to measure the distance you want 5 MEASUREMENT MODES: switch between 4 units (m/ft/in/ft+in) and start your measuring point from back, front and middle of the unit in Real-Time Continuous measurement, Pythagorean, Area, Auto Level, to Auto Height measurement modes BLUETOOTH COMPATIBILITY: easy transferring measurement data between the device and your phone via Bluetooth, and the Android or iOS application creates a whole floor plan instantly UNIQUE AND COMPACT: come with ultra-compact and uniquely design, weighing only 60g so it takes less space than your bulky measuring tools and can easily fit into any bag Product Weight: 60g (w/o batteries) Measuring Range: 0.65  65.61 ft.(0.2 - 20m ) Measuring Accuracy: +/- 2 mm (.078 in) Measuring Units: ft/ m/ in./ ft+in. Laser Class: Class 2; 630  670 nm; &lt;1 mW App Operating System: iOS 7,8,9/ Android 4.3 and above Bluetooth: 4.0 Measuring Start Point: front, middle, rear 1x Suaoki D5T Laser Distance Meter 2x 1.5V AAA Batteries 1x Lanyard 1x User Manual