Electronic spirit level Characteristics: @ LCD monitor ,can be rotated 180 ° @ Keep the display function @ The feature points progressive voice prompts @ Tilt direction instructions @ 0 ° and 90 ° feature points on the automatic calibration Technical Specifications: @ Laser wavelength: 650nm @ Laser Class: Class II / III @ Accuracy: ± 0.1 ° @ Units of measure: to switch between degrees and percentiles @ Measuring range: 0 ° -360 ° continuous measurement, display 0 ° TO 90 ° @ Power supply: 3 sets 7 # battery @ Size: 270 × 31 × 56mm @ Weight: 0.56 kg (with battery) The basic configuration: LS160-180, 3 batteries, soft package.