MS-5 Power Pet Door Collar with 2 Replacement Batteries

Advanced Digital Design: State-of-the-art circuitry provides a stronger signal and maintains accuracy across all temperatures for reliable operation.
Long Battery Life: Includes a specially designed battery that lasts approximately 3 months between changes to minimize maintenance.
Protected Circuitry: Battery design prevents damage if accidentally installed incorrectly for maximum durability.
Water Resistant Construction: Housing stands up to weather for reliable performance in any conditions.
Enclosed Speaker: Fully sealed ultrasonic speaker ensures consistent sound output without interference for accurate function.
One Size only, fits most dogs and cats