SportDOG SD-425XS Add-A-Dog Collar Training This allows the dog to

This allows the dog to communicate injury or threat without activating the device

Interior or exterior use

porches or any other outdoor shelter

Easy to grip and toss

Compatible with these PetSafe In-Ground Fence systems: PIG00-13661

SportDOG SD-425XS Add-A-Dog Collar Training This allows the dog toThe Collar Receiver for FieldTrainer 425XS. Add another dog to your current SportDOG Brand electronic training collar system or replace a Collar Receiver with the SDR AXS Add A Dog Receiver Collar. Features: Dog Size: 8 pounds or larger Fits neck size 5" 22" Battery Type: Rechargeable Li Ion Battery Life: 40 60 hours of "on time" per charge Battery Charge Time: 2 hour quick charge