After starting the product, short press the power/measure button, and the distance will be displayed in real-time. Single-button design for a facile and interactive experience. Measuring accuracy is plus 1/16-in (2mm). It uses a harmless double Laser-head with a 0.2s instantaneous response to achieve higher efficiency. Connect it to your phone's App via Bluetooth and access the extended memory, design blueprints, and on-photo annotations. 5 modes include measuring distances, angles, angular , and areas, and activating a virtual ruler. If the product is inactive for , it will automatically turn of. 1.8-inch LED color screen can display the power, connection status, mode, measurement history, units, and other data. Data is straightforward so that measurement is clear and uncomplicated. Measuring distance up to 164 ft (50 m), designed for multiple applications. Switchable among M/In/Ft for free adjustment. Universal Type-C charging port, you can share the charging cable for cell phones and other 3C electronic products, as well as not need to frequently replace the battery. The tool does not measure during the charging process. Upgraded with 850mAh ultra-high capacity lithium batteries. With a full charge, measure up to 2000 . Mini size and weighing only 90 grams, it is comfortable to operate and easy to carry. Innovatively designed Laser-measure is Ideal for areas such as rooms, apartments, buildings, real estate, factories, warehouses, etc. Versions: Professional Material: Rubber colour: Black Package Contents: 1 x Laser-rangefinder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.