[Tape measure] -Accuracy: 1.5 mm, tape measure 17 mm, extendable length 5 m. Flexible one key return with magnet; covered with a nylon cover, totally resistant to wear. [Laser range finder] - Accuracy: 2 mm; meters / feet / inches can be switched; continuous measurement, just move the device within the effective range to get accurate results. The double photosensitive aperture greatly improves the stability of the measurement. Class II laser, two working modes, more convenient for field application. [Built-in rechargeable lithium battery with USB charging, longer life, maximum power state can be used continuously for 5 hours , USB charging, can be recycled, reduce battery, save electricity, money and worry. [Other support functions] 1. Manual calibration and automatic adjustment of laser precision. 2. Front and rear reference switch. 3. The laser turns off automatically after 30 seconds of inactivity. After 180 seconds (3 minutes) of non-use, the screen will automatically turn off to save power. Delivery quantity: 1 * Tape measure