SportDOG TEK Series 2.0 GPS + E-Collar Add-A-Dog Collar

The TEK-2AD Add-A-Dog Tracking and Training Collar lets you add another dog to your existing TEK Series 2.0 system. In terms of range, accuracy, and reliability, the TEK Series 2.0 Tracking and Training System surpasses every other system on the market. This system can track up to 21 Collar Receivers/Handhelds so you can cover your whole pack.