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Home > Cat & Dog Products > Dog Tracking Collars > Garmin Alpha 100 Dog Tracker and Trainer

Garmin Alpha Astro T5 Collar

Garmin Alpha Astro T5 Collar
New and improved top-mounted GPS and GLONASS receiver/tracking collar for use with Astro 320 or Alpha 100

This rugged, all-weather collar works with the Astro® 320 or the Alpha 100 to safeguard against your dog getting lost.

When purchased separately, the T5 ships with a blue strap. When sold as a bundle with the Astro 320, an orange strap is included. 

Additional replacement collar straps are also available in multiple colors (sold separately). 

The innovative Collar Lock feature uses a four-digit PIN number that helps prevent others from seeing your dog’s whereabouts.

Attach Collar and Go

When teamed up with the Astro™ 320 or Alpha 100, this system will have you hunting in no time. 

The T5's Lithium-ion battery is rechargeable and replaceable and offers 20 to 40 hours of battery life.

You will know if your dog is pointing, sitting, moving or treeing. Where your dog is. Where it’s been. How fast he's moving and how far he’s gone.

The receiver’s ability to track additional satellites using the GLONASS system helps locate the dog’s position more quickly and maintains GPS location even in heavy tree cover or deep canyons. 

This waterproof (up to 10m), rugged and reliable tracking collar has a range of up to 9 miles. 


  • Top-mounted high-sensitivity, GPS and GLONASS receiver

  • 9 mi range

  • Replaceable collar straps – durable polyurethane-coated nylon with nickel-plated square buckle and collar keeper

  • Blue Collar Strap included

  • Collar strap size: 27" long; 1" wide

  • Fits dog neck sizes: 12" (30.5 cm) to 22.5" (57.2 cm)

  • Optional "Small Dog" strap fits neck sizes as small as 10.5” (26.7 cm) (sold separately)

  • Rugged and waterproof to 10 m (33 ft)

  • Battery is a rechargeable, replaceable Lithium-ion

  • Rescue Mode to prolong the battery life

  • LED Beacon lights for low-light conditions

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Item #: GARMIN-T5

Availability: In Stock. Usually ships in one business day!

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If you plan to use this product outside of the USA, please be advised that the radio communication frequencies utilized for United States models of the Garmin Alpha and Astro products may not be authorized for use in Europe.

To ensure compliance with local laws, the radio function that allows the U.S. dog collar products to communicate with the handheld device will be rendered inoperable when used in Europe (the radio communications between the collar and handheld will not work in Europe).

Product versions with the Europe-restricted modification began shipping in late 2013.

For all products sold before this modification has been implemented, the radio function will continue to operate normally; however, if you update the product's firmware or software to a new version that contains this modification, your product's radio function will be rendered inoperable.

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Garmin Alpha 100 Handheld

Garmin Dog Collar Transmitter Protective Cover