... : 7 Accuracy:+/-1 M Apresys Laser rangefinder with VD/SD/HD/INC, slope functions powerline800Type: Laser rangefinder with height, slope functions powerline800Model: ... instrument (ie pitch angle). Instruments laser power is small, on the human eye safety; do not need any more than cooperation ... activities, a good favor for measuring the distance Apresys Laser rangefinder Powerline800 w/ SD/VD/HD/INC