Adjustable R.A.P.T. strap with DT's Patented, revolutionary curved transmitter design and function offers multiple grip positions for a secure and comfortable fit; 1400 Yard (3/4 Mile) Range with DT's exclusive MAXX-Range 360 Internal Collar Antenna System for 360 degree signal reception in all terrain types; 16 easily adjustable Gentle Touch levels of Nick and Continuous Stimulation; Rapid Access button can be programmed for Nick (1/2 second stimulation), Continuous (up to 8 second stimulation), or Vibration Assist (vibration only); DT's Patented "Jump" feature is a one touch option to instantly go to a higher or lower level of stimulation, and is user programmable to any stimulation level from 1-16; Transmitter "Lockout" feature prevents unwanted corrections or accidental button activation; New Lightweight, Compact Collar design with rechargeable NiMH battery is completely Waterproof and fully adjustable to fit small to large dogs (6" to 22" neck size); Expandable to 2-dog or 3-dog system with R.A.P.T. Add-On collars: Toggle switch on Transmitter easily selects between dogs; Waterproof FLOATING Transmitter/Remote (uses 9V battery not included); Built in waterproof Magnetic ON/OFF system