Laser Tape Measurement NF-2240 Model Number: NF-2240 Main Function: Distance measurement and area/volume calculation. Max distance : 5m and 40m (laser) Power: 1.5V 2*AAA LCD screen Measurement precision ±2mm Laser auto-off 30s Auto-off time 2 min Working temperature: 0~40℃ Storage temperature: -10℃~60℃ Protection level: IP54 Dimension: 80*42*78 mm