Perimeter Technologies Four Pack Dog Fence Batteries for Invisible Fence R21 or R51 Receiver Collars (4-Pack) ProfessorZ 🏃‍♂️【MULTIFUNCTIONAL CONSOLE】The LCD monitor displays

🏃‍♂️【MULTIFUNCTIONAL CONSOLE】The LCD monitor displays your speed

- Motor: 48V 500W Brush-less Geared Motor

- Appropriate Height: 5'-5" to 6'-5"

Aluminum alloy powerful controller

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Perimeter Technologies Four Pack Dog Fence Batteries for Invisible Fence R21 or R51 Receiver Collars (4-Pack) ProfessorZ 🏃‍♂️【MULTIFUNCTIONAL CONSOLE】The LCD monitor displaysBrand: Perimeter Technologies Features: Pack of 4 batteries. The Perimeter Brand Invisible Fence Replacement Battery is the best solution for keeping your Invisible Fence Brand system operating safely. Compatible with R21, R22, or R51. Less Expensive than the original. Publisher: Perimeter Technologies Details: The Perimeter Brand Invisible Fence Replacement Battery is the best solution for keeping your Invisible Fence Brand system operating safely.