1. Conversion between relative measurement and absolute measurement 2. Conversion of angle and inclination. Data pinning for easy reading 3. of unresponsive screen shutdown, 3 minutes of unresponsive idle shutdown 4. Portable size, convenient for use with other measuring tools to expand the measurement range; 5. Built-in powerful magnets at four corners, and Type-C interface is rechargeable voltage: AC100-240V Material: plastic colour: black grey Package Contents: 1 x Laser Angle Finder 1 x USB Cable 1 x Bag 1 x English instructions 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.