"Purchased a $1500 DSC residential alarm system June 27, 2019.. After our local tech, with the help of the manufacture's tech had tried for two hours to get the system to work could not, I returned the equipment to Steve Knoch after receiving a RMA number. He should have sent a new replacement, but never did. Never returned any messages or text. It's It's mow October 16, 2019 since we returned the system and Have not received a replacement."