What is the difference between a direct connect amplifier and an amplifier/repeater?
All Digital Antenna amplifiers are dual band 3 watt variable gain RF amplifiers. They are all FCC approved to be used with all carriers in the USA and Canada. The DA4000 is a direct connect amplifier and is used with a cell phone adapter cable. The DA4000SBR and DA4000MR are wireless amplifier/repeaters that are used with an inside antenna to re-broadcast the signal to your cell phone and an outside antenna to communicate with the cell tower.