Rechargeable Battery: "The laser measure device built with rechargeable lithium battery, no need replace of batteries, it can be powered by power bank, computer,car charging or DC plug via USB Type-C.It's very environment friendly and durable" High Accuracy: "Our high precision laser measure can taking instantand reliable measures distances up to 60 meters within accuracy of 2 mm difference. Compared with the traditional measurement tool, the digital tape measure is more accurate and convenient” HD Display and Clear Reading: "The Hychika laser measurement tool has large backlight screen provides users with a better visibility. Mute setting allows your different needs .Also 3 interchangeable units among m, in, ft,are designed for people with different reading habits" Diversified Measure Modes: "The laser rangefinder has multiple functions, supporting area, distance, length, volume, continuous measurement, and Pythagorean measurement to meet different measurements. Widely used in indoor decoration, DIY design, construction,logistics,warehouses,etc" Compact and Stylish: "HYCHIKA laser measure is portable and rechargeable. Its surface material is composed of aluminum alloy and ABS, which provides premium look with anti-scratch advantage and robust performance" “Due to certain materials(such as water, glass) scatter or absorb the laser light and the Laser Measure‘s lens is unable to take an accurate reading, this results in Screen flickering OR “Err” reading occurs when the laser beam is unable to lock onto the surface it’s being pointed at, it is not a fault with the tool as it tries to capture and register the reflected laser beam. If necessary, a suitable laser target (e.g. white paper) needs to be placed to assist the measurement” NOTE - Laser Class: "Class II,Laser Type: 510~670nm, <1mw"