Garmin DC-40 GPS Tracking System Transmitter Collar (DC-40)

add-on collar for the Astro 220 GPS Tracking System



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Extra Dog Tracking transmitter for use with Astro 220 GPS Tracking System to track multiple dogs.

This rugged, all-weather collar combines a high-sensitivity GPS receiver and VHF antenna into an all-in-one transmitter that works with the Astro® 220 GPS Tracking System to safeguard against your dog getting lost.

The all-new DC-40 sports a durable one-inch orange polyurethane collar strap that fits most e-collar receivers—eliminating the need to put two separate collars on a dog.

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

Attach Collar and Go with the Astro 220 GPS Tracking System

When teamed up with the Astro™ 220, this system will have you hunting in no time. The DC-40, in combination with the Astro 220 handheld pinpoints your dog’s position every 5 seconds.

An innovative charging connection with a flashing LED-charging indicator lets you know when the battery is ready to go.

You can extend the battery life of the D-40 by changing the position transmit rate from 5 to 10, 30, or 120 seconds, enabling the DC-40 to work up to 17-48 hours in the field on a single charge.

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.

Astro: Leave the hunting to your dogs


  • High-sensitivity GPS receiver that connects to any standard 1” collar
  • Durable, high-visibility orange polyurethane collar strap
  • Dog position updates every 5, 10, 30 or 120 seconds—you choose
  • Seven-mile range, depending on terrain
  • Collar Lock prevents others from seeing your dogs’ whereabouts
  • Rugged, IPX7 waterproof design
  • 17 to 48 hour battery life (depending on update rate)
  • Rechargeable lithium ion battery is user-replaceable
  • Tough, rugged design
  • Convenient and easy-to-use

In the Box

  • DC 40 wireless transmitter with collar
  • AC adapter
  • Vehicle power cable
  • Quick start manual

Specs & Details

Transmitter Unit Dimensions:
3.25″W x 1.75″H x 1.5″D
Collar Length:
9″ to 22″
Total Weight with Collar:
8 ounces
Battery Life:
17-48 hours depending on transmit rate