[ Indoor / Outdoor Antenna ] Durable exterior and water resistant design provide clear pictures and full channel capacity even during bad weather intervened. [ UHF VHF Enhanced ] the AT-400BV-AMZ includes VHF Enhancer rods to strengthen VHF reception, don't need to use remote control to rotate a traditional huge outdoor HDTV antenna to receive better signal, no worry about If the long cable been tied together once rotated antennae in windy days. [ Exclusive Technology only by ANTOP ] Smprtpass amplifier techonlogy use all-in-one design to allow an easier connection between a non-amplified/passive antenna and your TV delivering the correct balance between short and long range reception. ANTOP was the first antenna manufacturer to include aBUILT-IN4G FILTER in all their amplified products to BLOCK 3G and 4G wireless signals to ensure NOISE-FREE digital TV reception. [ Save on Installation Fees ] tools-free and easier installation. Compared with big size traditional Yagi