Product Features Measuring up to 40 meters Fast and accurate measurement Measurement saving function 4 last measurements memory Large backlight screen provides users with a better visibility in low-light or no-light working conditions Built-in Electronic Level Small dimensions and weight Complete with 2 LR03 AAA 1.5V batteries and wrist strap Technical Data Range: 40 m Measuring Accuracy: 1,5 mm Switchable Unit:: m / in / ft Laser Color: red Laser Class: II Laser Wavelength: 635 nm Power Output: Backlight: Yes Automatic Laser Off: 70 sec Automatic Shutdown: after 10 minutes Dimension: 120 x 54 x 28