Ultrasonic distance meter/measurer Color: Yellow/Red/Blue/Orange With laser pointer Foot/Meter display options Measuring Range: 0.5m to 18m LCD screen with LED backlight Auto shutdown after 15 seconds without pressing any key Memory: can store 3 measurement data for calculation of area and volume Support sum-up, multiplication and subtraction of 2 measurement data. All stored measurement data can be cleared. Correction of errors: "Error" is displayed when the actual distance falls out of the measuring range Power supply: 1 x 9V Alkaline type 6LR61 Battery (Not included) Accuracy: +/-0.5% Ultrasonic Frequency: 40 kHz Working temperature: 0 ¡æ ~ 43 ¡æ Dimensions (H-P-l): 142 x 73 x 47mm Weight (without battery): 144.6g Laser beam: Wattage 1mW (mW =milliwatt) Wavelength: 650nm (nm =nanometer) Package includes: 1 x Ultrasonic distance meter 1 x Instruction Manual Ctn size¡¡§oo52*34*40cm G.W: 15.5kg per carton 100 pcs per carton