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KOLSOL Digital Protractor GYRO + Gravity 2 in 1 Digital LCD Protractor Inclinometer Dual Axis Level Box
Digital Protractor Accuracy&Resolution High accuracy +/- (0.05 Degree + 1%, high resolution Easy to use 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 rotation axis to another testing face. It will then show the angle once you not move the unit. Charger port The 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 

Price is $84.00
Price: $83.99