The Dogtra Edge Replacement Receiver is a replacement for a lost or damaged unit, or to expand an existing Dogtra Edge system. Choose from Black, Orange, Blue or Green Collar Straps.
So if you are buying a replacement collar , buy the same color collar strap as is being replaced. If expanding your system purchase the appropriate color strap to match the transmitter buttons.
Dogtra EDGE Includes a 2-Year Manufacturer Warranty