Quantityone (battery not included) Colororange black Sizeimage display Power supply modebattery (2 AAA batteries) With V-groove: The digital inclinometer has a magnetic base with a V-groove, allowing you to quickly and easily connect saw tables, band saws, metal rods and even round pipes. Measurement (degree/%/mm)/m/inch/feet) VA LCD display: The digital inclinometer can read values more easily and clearly even at night, because the upgraded LCD display can use new black and white characters. In addition, the digital inclinometer will indicate that the battery is low. Automatic return: The high-precision horizontal bubble bottle can work horizontally without a battery. When the head is lowered, the display is automatically reversed. Zero and Hold Function: Absolute and relative angles, slopes, and grades can be accurately measured on any imaginable surface.Good quality product