Fangrui Product Details Features: 1. This Mini Digital Laser Rangefinder With Multiple Measurement Modes, Such As Distance, Volume And Area Measurement, Ensures You Get The Quickly. 2. Automatic Calculation Of Area And Volume Based On Measured Length, Width And Height; Addition And Subtraction; Low Battery Indication. 3. When Measuring, There Are 4 Kinds Of Units To Choose From, Which Can Meet Most Users Measuring Habits. 4. Usb Rechargeable; Simple Function, Easy To Operate And Portable. 5. For Home, Building And Industry, Especially For Indoor Use. Description: 1. Measurement Accuracy: 3mmx 2. Unit: M/in/ft 3. Measuring Range (without Reflector): 0.03-60m 4. Measuring Time: 0.3-4 Seconds 5. Laser Type: 620-670mm, Less Than 1mw 6. Automatically Turn Off The Laser: 15 Seconds 7. Automatic Shutdown: 45 Seconds 8. Display Lighting: White Led 9. Measurement Base Switch: Allow 10. Power Display: Allowed 11. Battery Type: 200mah Rechargeable Carp Battery 12. Working Temperature Range: 0c~40c 13. Storage Temperature Ra