SensorMatic Color Duplex Multiplexer RV2216 allows for the connection of up to 16 cameras. Each camera connected to the multiplexer can record simultaneously to VCR' s. Simultaneous digital video motion detection on the RV 2216 use two 16 x 12 target motion detection grids for each video channel to set different options for day and night. You have the option for selectable target placement, object size, target sensitivity and alarm delay. I plugged in a 12V adapter(not included), power on and all buttons work/light up, but unable to test in the environment for use Part of an estate sale of an electronics store, lots to come Please know your electronics before purchasing an item, most of the items listed are from an estate, and I will describe the condition, and whether or not it powers up. Look at pics, please no returns, buy as is Shipping: If you are buying more than one item, please remember to check off the area that requests the seller to send an invoice, so I can combine the order for you before you pay. I offer several methods of shipping, choose which is best for you. Thank you again for browsing in my store, there is always something new and exciting coming your way! Feel free to ask questions, and let me know if there is a problem with an order before putting in a claim with, so we can work things out. Thank you again Estate Treasures by Alana