KAIYIKAPET Model X3 Single Remote Control (Collar not included)

Compatibility: Two options: X1 model/ X3 old model (2-step distance): It can match the old X3 model and X1 model collars, the new X3 model collars (14 levels adjustable fence distance) are not compatible. X3 new model (14 levels of adjustable distance): Match only 14 levels of adjustable fence distance. Please note before purchasing: select the product model that matches your previously purchased order.