The AT&T Merlin Classic 410 Control Unit (KSU) is equipped to enable up to 4 lines and 10 stations. It is compatible with either a Feature Package 1 or 2. Works with all Merlin Classic phones.
*You cannot use both a Feature Package 1 and a Feature Package 2 at the same time. They go in the top slot of the phone system.
We accept product returns for 30 days for just about any reason. If you bought the wrong item, don't like the fit of a headset, or just changed your mind we'll take it back. If you want to return any phones or parts please use the original packing materials as the items much be returned in the same condition as they were when purchased. You would be responsible for the return shipping costs, safe packaging, and insurance.
Most phones will ship within 2 business days. We are closed on weekends and don't ship products on Saturday or Sunday. Priority shipments usually ship the same business day, if it must ship the same day please call after you place your order to make sure we can fulfill it the same day.