Combination of compartments- The combination of 40M and 5M Lasr rangefinder tape measure, self-locking tape measure, high-end black and white reverse display, the results are more visible Tape Measure - Accuracy: 1.5mm, band width 17mm, stretch length 5m. Flexible "One Key" back with magnet; Coated nylon coating, completely wear-resistant. Laser Range Finder - Accuracy: 2mm; m / ft / in switchable; Continuous measurement, just move the device within the valid range to get the exact result. The photosensitive double aperture apparently improves the stability of the measurement. Class II Laser, two working modes make it more convenient for field applications. USB Rechargeable - Built-in and rechargeable lithium battery for longer life, power status can be used continuously for 5 hours, USB rechargeable, can be recycled, reduce battery life, save money and worry. Other Supported Functions - 1. Manual calibration automatically adjusts the accuracy of the laser. 2. Switch between forward and reverse references. 3. The laser automatically turns off after 30 seconds of inactivity. After 180s (3 minutes) of non-use, the screen will automatically turn off to save power. Number of sends: 1 pcs