Main features 1. Distance/ Area/Volume measurement. 2. Pythagorean proposition indirect measurement 3. Voice broadcast function 4. Single/Continuous measurement 5. Addition/ Subtraction Measurement. 6. Units and benchmark selectable. 7. Automatic horizontal and vertical 8. Rechargble lithium battery for power supply Applied range： * Used for interior design and decoration technology filed. * Construction supervision & on-site detection function. * Real estate, fire control and assessment of industry planning. * Public facilities use. Technical indexes: Measurement distance    NF-272L 60m/80m/100m Accuracy    ±2mm Test time    0.2~3S LCD screen    FSTN with backlight Buttons    7 Units    m/ft/in/ft+in Benchmark    ✔ single/continuous measurement    ✔ Distance/ Area/Volume measurement    ✔ Pythagorean proposition measurement     ✔ addition /subtraction measurement    ✔ Voice broadcast    ✔ bluetooth 4.x    ✔ Data storage    99 sets Laser auto-off    30s Auto-off time    2mins Power supply    850mAh Lithium battary Working temperature    0℃～40℃ Storage temperature    -10℃～60℃ Protection level    IP40 Package Include: 1 X laser distance meter