Mileseey Laser Rangefinders with Bluetooth, Distance Meter with 2 Spirit Level Bubbles, Laser Tape Measure ±2mm Accuracy About the function about Bluetooth connection, it need a phone software to complete it. like"SmartLife" , "JoyPlan" or "ImageMeter", Maybe buyer can have a try if you have any iue about the Bluetooth connection About this itemDisplay in real timeWirele connectivity allows this laser meter to share information wirelely to a phone, while the free "SMART LIFE" app allows users to document measurements and create floor plans. A png fly export from the "SMART LIFE" app is good enough for most of us to use as reference±2mm AccurateMiLESEEY D5T laser measure equiped with plumb and level vials so that you can make sure youre taking your measurements on the level, Providing more precise measurement compared to one bubble; Applied MILESEEY's Power Burst Technology, D5T laser measurer delivers greater precision measurement, provides accuracy up to ±2mm, measures up to 70M for profeional confidence, fast measure in 0.5 seconds.Units Switch &30 Data RecordsThe electronic tape measure can freely switch the units in M/ FT/IN/ft+in; 30 data records and recall function which are useful for reviewing and calculating; The measurer is portable Pocket-sized, non-slip design; 180s of automatic shutdown to save the power, can work up to 5000 times.2 Large LCD Backlight &Mute Setting This digital tape measure with a 2 inches backlight LCD screen, provides you better visibility in dark areas. The display can be read easily both indoor and outdoor even under the strong sun light. Mute Function allows you turn on or off the measure beep at your will, suitable for using in library, claroom and other quite places.Multiple Measurements Features Mileseey laser measure device can measure distance, area, volume, continuous measurement and pythagorean; Addition and subtraction mode helps you get the calculation results more effectively; The continuous measurement mode records the maximum and minimum values to use as per your need. Those modes are a great time saver for people who need a quick measurement of a house, room, backyard or entire construction site.What you getMiLESEEY lazer measurement tool has CE / FCC / ROHS / FDA certification. Packing List:1 x laser distance meter, 1 x instruction manual, 1 x carrying case, 1 x wrist strap.[NOTICE]Laser cla: Cla II,Laser type: 635 nm <1mW,Certification:CE/FCC/ROHS/FDA/WEEE certification. Battery is not include.