Product 1: Patented sensor technology

Product 1: Measures in inches and feet

Product 1: Accurate to 1/10 of a degree

Product 1: Set a beep for any desired angle

Product 2: 24-inch electronic level; measures in degrees, percent slope, and pitch

Product 2: Measures all angles in 360-degree range; automatic shutoff after 5 minutes

Product 2: Aluminum frame for lightweight strength

Product 2: Includes 1 level and case; 9-volt battery not included

M-D Building Products 92325 48-Inch Smart Tool Digital Level with Carrying CaseUsing custom patented sensor technology, SmartTool has been the digital level leader for over 20 years. Displaying in degrees, % slope or inches per foot, it is accurate to 1/10 of a degree and holds the best accuracy of any digital level on the market that MD has tested. Its 9V battery (included) runs for over 500 hours and has the ability to beep at any angle you choose.MD 92379 Smarttool Rail with Free Case, 24-InchSmartTool electronic level all ready to go in a 2 ft. long aluminum frame. Only SmartTool electronic level can measure all angles in a 360 degree range. Installing a deck, stair rail, extending a roof, or determining how much an old floor has sagged is simpler and less time consuming. The display even flips over with the level, and it shuts off automatically after 5 minutes when it is not being used, all this from a standard, 9-volt battery (not included). Features: angle accuracy to 1/10 of a degree, the mode button lets you see angles in three ways-degrees, percent slope or pitch (inches of rise per foot of run), and Listen & Level ideal for poorly lit areas. Also allows hands-free operation as the audible tone alerts you when tool reaches level or plumb. Includes case, a $22.00 value. Please note that the module cannot be removed from the rail.SmartTool electronic level all ready to go in a 2 ft. long aluminum frame. Only SmartTool electronic level can measure all angles in a 360 degree range. Installing a deck, stair rail, extending a roof, or determining how much an old floor has sagged is simpler and less time consuming. The display even flips over with the level, and it shuts off automatically after 5 minutes when it is not being used, all this from a standard, 9-volt battery (not included). Features: angle accuracy to 1/10 of a degree, the mode button lets you see angles in three ways-degrees, percent slope or pitch (inches of rise per foot of run), and Listen & Level ideal for poorly lit areas. Also allows hands-free operation as the audible tone alerts you when tool reaches level or plumb. Includes case, a $22.00 value. Please note that the module cannot be removed from the rail.