F-Amp with xConnect Pigtails – Pack of 5 – You are purchasing a pack of 5 F-Amps. F-Amps are used to boost the data signal from the controller to pixels. They work with 5v and 12v pixels. The F-Amp can be attached directly to the pixel controller or can be placed some distance away from controller to help boost the data signal to the pixels. F-Amp has a IP68 rating. Total size is about 12inches in length.