Protective Pouch Case Cover Holster Compatiblewith Garmin Astro 220, 320, 430, & Alpha 100 (Brown, Orange) Made In U.S.A. (Brown)

let's try and take a side-by-side look at the two dog tracking handheld GPS devices the older Astra series represented in this video by Astra 220 and brand new Alfa 100 let's start with the physical appearance the physical dimensions of both units are almost the same with alpha just point one inch wider and thicker than Astra series devices both units have a GPS antenna and removable VHF antenna the most obvious difference is that instead of physical buttons in astra series alpha uses touchscreen controls the only physical buttons on alpha are the power button on the side and three dog training buttons above the screen this is another major difference between these products while Astra series were just able to track the dogs but did not have the means of communicating with them alpha units incorporate tri tronic solution that allows owners to both train their dogs and also send remote c