Company Email Address.. [email protected] The Astro GPS Dog Tracking System requires very little configuration straight out of the box, and is extremely simple to use. Once the transmitter and receiver acquire a GPS signal, the receiver automatically lets users know the location of their dog. There are no subscriptions or setup fees required to use the device. NEW!- GARMIN ASTRO 320 + 5 DC 40 COLLAR DOG TRACKING COLLARS......$600 usd NEW!- GARMIN ASTRO 320 + 4 DC 40 COLLAR DOG TRACKING COLLARS......$500 usd NEW! -GARMIN Astro 320 GPS Tracking Collar with DC-40 (10 Dog Combo) ....$1,300 usd NEW Garmin Astro 220 Dog Tracker+4 Dc30 Collar Bundle Dc-30......$380 usd NEW Garmin Astro 220 Dog Tracker+4 Dc40 Collar Bundle Dc-40......$500 usd NEW Garmin Astro 220 Dog Tracker+3 Dc40 Collar Bundle Dc-40......$450 usd NEW Garmin Astro 220 Dog Tracker+2 Dc40 Collar Bundle Dc-40......$350 usd BUY 3 UNITS AND GET 1 FREE, BUY 5 UNITS AND GET 2 FREE ALL INCLUDING FREE SHIPPING TO YOUR DOORSTEP,!!! Company Email Address.. [email protected] Skype : telcltd0 Tel: +447011120692 Frank Scott Sales Manager Of The Company..