【New Buttons】Different colors acheive different functions. Easier to use and remember.
【Improved Function】Press WHITE button once to reset zero degree. It's convenient for measuring different joints. *Old version need to press for 2 seconds to reset zero degree.
【Invert Display】When measuring on awkward position, click RED button to inverted display. It will be read in comfortable way.
【Hold Function】Freeze the result and transfer to other place.