General description The Digital Ultrasonic Laser Distance Meter Rangefinder is designed for precise distance, area, and volume measurements. It features a measuring range from 50cm to 18m, making it suitable for various applications in DIY and home improvement projects. Technical specifications Weight: 120g / 4.2oz Measuring Range: 50cm ~ 18m Accuracy: 0.5% Resolution: 0.01m Maximum Measured Distance: 18m Battery: 9V (not included) Transmission Frequency: 40kHz Working Temperature: 0℃ ~ 50℃ Usage The ultrasonic rangefinder measures distance from the bottom of the device, not the top of the obstacle. For optimal accuracy, keep the measuring body perpendicular to the wall, especially for longer distances. Activate laser positioning for long-distance measurements to ensure the most vertical position possible.