Specifications: Mini Digital Distance Meter Lazer 30 40m Measure Range Rangefinder Rechargeable Ourdoor and Indoor Range Finder Hunting Building Color: black Measuring Range: 0.05-30m,0.05-40m Material: ABS Measuring Time: 0.1-3s Display: LCD with Backlight Accuracy: 2mm Measurement Unit: m / in / ft Laser Class: Class II Laser Wavelength: 635nm Laser Output: <1mW Water-proof and dust-proof grade: IP54 Laser Auto Off: 30s Power Auto Off: 480s Measurement Reference Switch: Yes Power: rechargeable lithium battery(200mAh) Item Size: 100 * 32 * 12mm / 3.94 * 1.26 * 0.47in (L * W * H) Package Size: 135 * 70 * 35mm / 5.31 * 2.76 * 1.38in (L * W * H) Item Weight: 30g / 1.06oz Package Weight: 102g / 3.60oz Package List: 1 * Distance Meter 1 * USB Cable 1 * User Manual(Chinese + English)