Laser Distance Meter High Accuracy Infrared HD LCD ABS Shell Laser Measurement Tool for Construction 100m 328.1ft Item Type: Laser Distance Meter Material: ABS Ranging Accuracy: ±(1.5mm+d x 5/100,000) Continuous Measurement Function: Yes Area and Volume Measurement: Yes Pythagorean Measurement Function: Yes Addition and Subtraction Measurement Function: Yes Area Volume Addition and Subtraction: Yes Maximum or Minimum: Yes Self Calibration Function: Yes Laser Class: 2 Laser Type: Class 2 635nm, <1mW Number of Stored Records: 99 Automatic Cutting Laser: 20 Seconds Automatic Shutdown: 150 Seconds Maximum Battery Life: 8000 times Storage Temperature Range: -20℃-60℃ Protection Class: IP54 Operating Temperature Range: 0℃-40℃ Storage Humidity: 20%~80%RH Battery Type: 2 x 1.5V AAA alkaline battery 900mAH (built in)