1、HIGH ACCURACY: The laser measurement mode of the tape measure, which measures distances with great accuracy, will always remain straight for more accurate measurements. 2、AUTOMATIC SHUTDOWN: The tape measure can automatically shut down after 150 seconds of operation without operation, with low power consumption. 3、DOUBLE SIDED SCALE: The tape measure has a double sided scale for measuring and reading the tape measure from the front and back, which is very convenient. 4、WIDE APPLICATION: The tape measure is ideal for home, construction and industry, especially in large areas such as rooms, apartments, buildings, factories, warehouses, etc. 5、MAGNETIC HOOK DESIGN: The tape measure adopts magnetic hook design, which can be firmly attached to ferrous materials and improve the accuracy of internal and external measurement. Item Type: Laser Tape Measure Material: ABS, Manganese steel Distance Meter Parameter: Measurement Accuracy: ±2mm Self Calibration: Yes Continuous Measurement: Yes Measurement Units: m, in, ft Sound Alert: Yes Laser Type: Class 2 630-670nm< 1mW Laser Off: 20 seconds Automatic Shutdown: 150 seconds Storage Temperature: -20℃-60℃ Operating Temperature: 0℃-40℃ Storage Humidity: 20%-80%RH Batteries: 2 x 800mAh 1.5V AAA batteries (shipped with matching batteries) Tape Parameter: Distance Measuring Range: Approx. 5m / 16.4ft Minimum Scale: Approx. 1mm / 0.04in Tape Width: Approx. 19mm / 0.75in Ruler Tape Thickness: Approx. 0.16mm / 0.01in Unit: Metric system Tape Material: 65 manganese steel Tape Hook: movable with double sided magnet Self Locking Function: Yes 1 x Laser Tape Measure 1 x Instruction 2 x Battery 1 x Screwdriver