Garmin Alpha TT 25 Tracking and Training Collar Instructional Books & DVDs Weatherproof design allows it to

Weatherproof design allows it to be used in extreme cold (-42F) or during heavy rain

Nylon shank

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Its breathable fabric ensures comfort

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Garmin Alpha TT 25 Tracking and Training Collar Instructional Books & DVDs Weatherproof design allows it toThe Garmin Alpha TT 25 Tracking and Training Collar has a rugged, slim design and is universally sized to fit large and small breeds. The Alpha TT 25 easily pairs with the following Garmin receivers: Alpha 10, Alpha 100, Alpha 200, Alpha 200i, Alpha 300, Alpha 300i, Pro 550 Plus and Astro 430. The top mounted, high sensitivity GPS and Galileo receiver keeps track of your dogs location, and the Alpha TT 25 collar transmits that location via VHF up to 9