TOPCON 1051612-22 - RL-HV2S Self-Leveling Dual Grade Rechargeable Laser w/ LS-100D Receiver and Bluetooth ControlDUAL SLOPE, LONG RANGE, SELF LEVELING LASER Following in a long line of superior quality laser transmitters the RL HV2S is a dual slope, long range, self leveling instrument built to outperform all of its competitors. Bluetooth Laser Manager for your phone (App Download) Compatible for iOS and Android provides wireless remote control using a cell phone to adjust slope and check calibration remotely. No special remote control needed. This laser is for