Tape measure three in one: measuring instrument + tape measure + digital display, three in one. The functions of all three are combined into one, powerful and convenient to use. 40m laser distance measurement, 5m tape distance measurement, millimeter accuracy, automatic calibration. USB charging: rechargeable laser tape measure, no longer worry about changing the battery, strong battery life, long standby time. Reminder: When you use it for the first time until there is no more electricity, please use the AC adapter to fully charge it for 2 hours to keep the battery in good condition. / p Laser distance measuring tape: It has both tape measure and laser measure functions. Easily handle short distance measurement and long distance measurement tasks. Versatile, compact and practical spectroscopic lens, backlit display, easy to measure and record. Two measurement methods: Double ladders at the front, with three rivets at the front to make it firmer and greatly increase durability. Two measurement methods, the hook is measured with the inner side of the hook of the ruler as the base point of 0, and the measurement is correct; 0 scale base point, the retracted length of the hook is the thickness of the hook and the measurement result is correct. Application range: small and practical, easy to grip, lock Powerful brake, high strength card position to prevent the tape measure from shrinking and hurt your hands. Wide range of applications, interior decoration, exterior measurement, building measurement, carpenter measurement, DIY manufacturing Product name: laser tape measure Loading mode: function USB charging port Volume length: 5M Measuring function: tape measure, digital tape measure display Quantity: 1 piece Settlement: Set a front and back baseline: 1. On power up, press and hold the power button for 3 seconds to set the previous benchmark. 2. Press another 3 seconds to set the back-end reference. Adjustment error: 1. In shutdown state, press and hold the power button for 5 seconds and enter the setting interface. 2. Press the power button again to resolve the error. Adjustment error: 1. Under the settings interface, press and hold the power button to enter the device switch interface. 2. Press the power button again to change the units (m / ft / in) Packaging: 1 x Laser Tape Measure With the difference in the measurement method, please allow some size deviation. Due to the computer monitor settings, the color may be slightly different.