Material: Aluminium/ABS, Measuring range: 4*90 degree, Resolution: 0.1 degree, Accuracy: ±0.3 degree, Power supply: AAA*2 battery(NOT INCLUDED), Magnet: inside(BOTTOM ONLY), Repeatability: 0.1degree. Used for Absolute and Relative angle measurement in automotive, woodwork, building, drilling machinery etc. Magnet at the base of the device will help to mount it on the machinery. Battery: AAA*2 battery (NOT INCLUDED). Magnet on one side(BOTTOM ONLY) to mount on the Iron object to work conveniently hands free. Measuring range: 4*90 Degrees. Resolution: 0.05 Degrees. Accuracy: Plus/Minus 0.2 Degrees. Repeatability: 0.1 Degrees. FUNCTION: HOLD/Tilt%- Press it for long time, the unit can be changed from degree to tilt%. Press it for short time, the data will be held for convenient reading. ZERO- Data reset, to proceed with relative measurement. Long press to switch on LCD backlight. Portable size ,convenient to co-work with other measuring tools and enlarge measuring range.FUNCTION: HOLD/Tilt%- Press it for long time, the unit can be changed from degree to tilt%. Press it for short time, the data will be held for convenient reading. ZERO- Data reset, to proceed with relative measurement. Long press to switch on LCD backlight. Portable size ,convenient to co-work with other measuring tools and enlarge measuring range. With on-off power switch & Auto power-off option. Quick display of the measured value on big LCD screen.With on-off power switch & Auto power-off option. Quick display of the measured value on big LCD screen.