A Quick Look at the H25-100. The H25-100 is the same in size and function as the H25-500 as you can see in the previous First Look. You will note that there is a slight difference on the back of the units in the location of the plugs. Inside, like the H25-500, you will find no wasted space. The H25 series is powered by an external power supply to keep the unit small and easy to conceal. Overall, there is not much to say. The H25-100 is essentially the same thing as the H25-500. These units should start appearing in customer's homes at any point now. Please note that some DBSTalk.com testers and staff members may have received free equipment from DIRECTV or its partners for the purpose of evaluation and testing. These First Look documents may be the result of that evaluation and testing.