![Amazon.com: SportDOG Brand FieldTrainer 425X Add-A-Dog Collar - Additional, Replacement, or Extra Collar for Your Remote Trainer - Waterproof and Rechargeable with Tone, Vibration, and Shock : Pet Supplies Amazon.com: SportDOG Brand FieldTrainer 425X Add-A-Dog Collar - Additional, Replacement, or Extra Collar for Your Remote Trainer - Waterproof and Rechargeable with Tone, Vibration, and Shock : Pet Supplies](https://m.media-amazon.com/images/I/71SxOKQU-xL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: SportDOG Brand FieldTrainer 425X Add-A-Dog Collar - Additional, Replacement, or Extra Collar for Your Remote Trainer - Waterproof and Rechargeable with Tone, Vibration, and Shock : Pet Supplies
![Premier Pet Wireless Add-A-Dog: Adds Unlimited Dogs to Premier Pet Wireless Fence, Additional or Replacement Collar, Adjustable, Waterproof, Tone & Static Correction, Low Battery Indicator - Walmart.com Premier Pet Wireless Add-A-Dog: Adds Unlimited Dogs to Premier Pet Wireless Fence, Additional or Replacement Collar, Adjustable, Waterproof, Tone & Static Correction, Low Battery Indicator - Walmart.com](https://i5.walmartimages.com/asr/a209eb1e-51de-432f-ae93-b7c59c75365c.c92d953476318a08192828ae6292c723.jpeg)
Premier Pet Wireless Add-A-Dog: Adds Unlimited Dogs to Premier Pet Wireless Fence, Additional or Replacement Collar, Adjustable, Waterproof, Tone & Static Correction, Low Battery Indicator - Walmart.com
![Amazon.com: PetSafe Add-A-Dog Remote Training Collar – Perfect for Small, Medium and Large Dogs – Choose from Tone, Vibration, or 15 Levels of Static Stimulation – Waterproof and Durable – Rechargeable : Pet Supplies Amazon.com: PetSafe Add-A-Dog Remote Training Collar – Perfect for Small, Medium and Large Dogs – Choose from Tone, Vibration, or 15 Levels of Static Stimulation – Waterproof and Durable – Rechargeable : Pet Supplies](https://m.media-amazon.com/images/I/81AfgoQVMkL._AC_UF1000,1000_QL80_.jpg)