TCN Laser Level RL-H5B Rotating w/ Receiver KitLong range high accuracy laser With great distance and high accuracy, the RL H5 Series is simple to use for checking elevations. Easy to use With electronic self leveling, you press the power button and go right to work in seconds. If the RL H5B gets disturbed on the job it relevels itself automatically. The self leveling motors are accurate to 20 arc seconds. Long range operation Need to shoot elevations up to 400 m from your laser? No problem this