JQ-40 Mini Laser Distance Meter 40m Rechargeable Digital Handheld Laser Rangefinder Portable Laser Range Finder Build Measure Feature Application Multi-purpose Measuring Tool- Can be widely used in interior decoration, interior design, construction (rooms, apartments, buildings, real estate, factories, warehouses), etc. Compact & Portable- Capable to be stored in any jacket or trouser pocket or handbag, easy to carry around; ABS shell offers comfortable touch feel. Battery & Backlight- Powered by energy-saving and eco-friendly lithium battery, which allows you to measure distance for 2000 times when fully charged. With clear backlight for easy reading, no need to turn it off manually, it will turn off after 10s without operation and the metter will shut down automatically after 60s. Multiple Units- Allows you to switch the unit among meters (m), inches (in) and feet (ft), ensuring that you can take measurements quickly and easily to increase efficiency. Specification Measuring Range: 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<1mw Laser Output: <1mW Water-proof and dust-proof grade: IP54 Laser Auto Off: 15s Power Auto Off: 45s Measurement Reference Switch: Yes Power: rechargeable lithium battery(200mAh) Operation Temperature: 0~40℃ 32~104℉ Storage Temperature: -20~60℃ -4~140℉ Item Size: 109 * 35 * 22mm Package included 1x Laser Rangefinder 1x Hand Strap 1x USB charging cable 1x User Manual