Durable and easy to use, the SmartTool™ digitally displays degrees, percent slope, and pitch (rise over run) to 1/10 degree accuracy. Simply press the on/off button to see the angle of any surface. The convenient user-oriented display always reads right side up. Also features an audible tone alert when the tool reaches level or plumb and push-button calibration. Housed in a rugged, high impact-resistant ABS polymer case. Includes 9V battery.