[2 in 1 Measure Tool]: This laser-tape measure includes two mode-131ft/40m measurement and 16ft/5m AutoLock tape measurement. Press the "FUNCUNITS" button of this laser-measuring tape 2s to switch units among M / In / Ft freely.rge. [4 Measuring Modes]: Press the "FUNCUNITS" key to switch the mode of laser-tape measure, followed by area measurement, volume measurement, Pythagorean measurement, double Pythagorean measurement to satisfy your all needs. [USB Rechargeable ]Built-in 180mAh lithium battery and USB port ,the laser-tapes can be rechargeable via USB cable.Can be used 3000 times for 5 hours when fully .(Note: Charging with a voltage within 5V, for example: PC USB port) [High Precision]: 40m/131ft, measurement accuracy: +/- 2mm,It's available to operate continuous measure, accurate distance can be read within the effective range while moving,Class II laser-production less than 1mW power output. [COMPACT & POWERFUL ]Just turn on the switch and press the operation button to instantly measure the distance accurately and operate easily. Fits in your hand, has an easy-to-read LCD display, and can be used in dark places and rain. The simplest professional rangefinder.Idal fits for DIY, construction,home decoration. colour: black Material: plastic Size: 75x75x38mm Package Contents: 1 x Digital Laser-Tape Measure 1 x USB charging cable Only the above package content, other products are not included. Note: Light 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.