The antop sdat-601w smartpass amplifier is designed to work with any non-amplified/passive antenna to boost the over-the-air tv signals received. The antop smartpass amplifier’s all-in-one design, allows you an easier connection and more possibilities in receiving different signal ranges. You don’t have to hesitate any more on deciding between a short range and long range antenna. Antop’s smartpass amplifier delivers the correct range for you, featuring dual-colour indicator, green for long reception and yellow for short reception. The attached 3ft and 0. 3ft extension coaxial cables at either end offer connection flexibility and enable you to move the antenna within a wider placement range for better reception. Also included is the 4g lte filter, antop was the first antenna manufacturer to include a built-in filter in an amplifier. This filter blocks 3g and 4g signals from wireless networks and devices to ensure a noise-free digital tv reception. The at-601w supports over-the-air tv signals including hdtv, 1080p tv and 4k ultra hd.