DXL360S Digital Protractor Accuracy&Resolution-High accuracy +/- (0.05 Degree + 1%, high resolution 0.01Degree Easy to use-DXL360S inclinometer has 5 face Magnetic base, Audible alarming at settable angle range. There is 4 face V Shape case for easy to fit at the corner or pipe. Press Angle key at the first face, and then rotate slowly and must keep the rotationaxis to another testing face. It will then show the angle once you not move the unit. Charger port-The DXL360S Digital Protractor could be rechargeable.It is very convenient by using it, connecting the USB cable to the unit and a computer's USB port. The charger port is 5V 500mA Mini type-B USB port. User Interface-The angle finder is designed with Mono-color LCD with backlight, friendly for the users. Wide range of applications-You can use the digital protractor in the follwing application:Interior decoration,Construction area,Plumbing,Floors & Stairs,Woodwork.