[Digital Goniometer] Digital goniometer with hole for hanging digital angle scale, designed for industrial applications where Accurate angle adjustment is important, such as: B. Niches and cabins, sloping roofs and handrails (Note: This is not a digital spirit level). 【LCD Backlit Display】LED backlit display, can read data clearly even in low light conditions. 【High Accuracy】Measuring accuracy ±0.5°, angle increase/decrease: 0.1°, angle range 0-225°, so you can accurately measure the angle horizontally and vertically. 【Mechanical Lock】There is a LOCK button to keep the angle unchanged during the line process and a HOLD button to lock the angle. 【Auto Shutoff】Powered by a 9-volt battery, included in the delivery, it automatically turns off after 5 minutes of inactivity to extend battery life. WARNING: Do not move screws and components arbitrarily. Handle your angle indicator with care. Be careful, turn the rotating arm with even force and do not apply too much force. Do not leave the