Solid ILA-30 30dB Coaxial Line Amplifier High Quality & Brand New 20dB Coaxial Line Amplifier Frequency Range: 900-2300MHz Support DC 12 -18V 1 port for LNB and 2nd Port for Decoder / Receiver How to install: Please power off your receiver before connecting the switch to prevent static damage to your equipments. Compatibility: Compatible with all kind of Satellite TV system DD Direct plus, Videocon D2H, sun Direct, Direct TV, TATA Sky, Dish TV or also Support C-Band signal Receptions. How it is works: This Amplifier is used to amplify both terrestrial (antenna) and satellite signals up to 20dB on long cable runs. It will help with rain fade and weak signals. The Amplifier is powered by 12v - 18v DC from your satellite receiver or LNB power injector.