Battery Capacity: This product comes with a built-in rechargeable lithium battery with a capacity , making it easy to meet daily usage needs. Accurate measurement: The accuracy of this product is ± 0.2 °, and the display resolution is 0.05 °. Measurement range: 4 x 90 ° and 2 x 180 °. It has a Data Hold function that freezes the currently displayed values during the measurement process, making it convenient for users to record or view. Widely Used: Including precise cutting of wood angles in the woodworking industry;Accurate control of tire angles in the automotive repair industry; precise positioning of machine tool working angles in mechanical machining. and Sturdy: This product is made of sturdy and ABS material, with a compact structure, light weight, and easy to carry and use. The four sided magnetic and can easily adsorb to metals. Beep notification: This product has a built-in beep notification function, which emit a rapid beep when the following standard angles are detected: 0 °, 30 °, 45 °, 60 °, 90 °. Within ± 1 ° of the standard angle(Excluding negative angles), emit a slow beep sound as a gradual reminder., Manufacturer: PokFhgur