Expandable to 2-dog or 3-dog system with R.A.P.T. Add-On collars; 1400 Yard (3/4 Mile) Range; Waterproof FLOATING Transmitter and fully Waterproof Collar & Beeper; 16 intensity levels of Nick and Continuous Gentle Touch e-Stim; Includes Vibration Assist Vibration Training System; MAXX-Range 360 Internal Collar Antenna System; Transmitter "Lockout" feature prevents accidental stimulation; Separate beeper tone option for each dog, so you can tell dogs apart via their own unique "Beep"; Beeper can be programmed for Run/Point - Point Only - or Manual Locate; Manual Locate button can be pressed at any time without cancelling out the current programming function of the beeper collar