So the indoor antenna works just like the outdoor antenna?? so without cable we should get clear tv on all our tvs??

Your results will vary depending on location. Most of the major broadcast stations will come in super hi-def. My friends are amazed. Other smaller networks will come in very good, and other channels not so much. Its important to try moving the antenna around. Use the web to find out where the antennas closest to you are,facing your atenna toward the nearest signal can help. Each time you try a new spot, do a channel search and see what you get. I generally get about 20 channels. The other difference you will notice is that if someone stands in a particular spot in your home they can interfere with the signal. Some large trucks with cb radios can also cause some problems. Its worth using if your like me and refuse to pay for cable, you dont want to pay an extra box charge for your spare tv, or you live where there is no cable options.