40M Range Meter Manual Measurement Digital Area Distance Volume With Bubble Level Measuring Tool Product Name: Laser Rangefinder Measuring accuracy: ± 1.5mmMeasuring range: 0.03-40M; Minimum display: 1mm; Single Measurement Time: 0.1 - 4s Battery Type: AAA 1.5V Battery x 2; Operating temperature: 0 °C -40 °CAutomatically turn off the laser: 60s; Auto Power Off: 480sProduct Size: 120*60*30mm Color: Black + Green Material: Plastic How to Use1. Place the rangefinder over a wall or place it on the floor or just hold it on your hand.2. Press the distance button to turn on the laser.3. Point the laser-on-target, press the distance button again, and read the measured reading directly from the screen.4. When measuring the area, press the area button, and then measure the length and width. The rangefinder will automatically calculate the area.5. While measuring volume, press the volume button and measure the length, width, and height. To add or subtract a distance, first measure the distance, then press the plus or minus sign to add or subtract the next distance. Use this function to measure the circumference, nonlinear distance (add multiple short distances) and measure directly (measure the whole segment and subtract the small segment to get the remaining distance)Widely used in high degree of measurement, area measurement, volume measurement, measurement action hook; 20 sets of data storage. Package Contents:1 * Optical Tester1 * Lanyard2 * Battery Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.