Mohu Antenna Jolt TV Antenna Amplifier, Certified Refurbished (MH-110534) Mohu Clean Peak filter technology specially designed to amplify TV stations and filter out any RF signals that can hinder picture quality providing you with a clearer picture Designed with other passive TV antenna amplifiers in mind Jolt offers a sleek appearance that will enhance both your HDTV antenna's visual appeal as well as your antenna's channel reception Compatible with any non-amplified antenna Jolt utilizes a low-noise figure and one-of-a-kind RF filtering to enhance signal strength Jolt TV antenna amplifier offers two power options - either with the USB port on the back of your TV or the included AC wall adapter. Certified Refurbished by manufacturer shows minimal or no wear. Amplifier comes with a 1-year warranty.