Selling As IS ! Because I could only get two of the 3 to work. The 3 makes noise but you cannot hear someone talking. The product is a vintage Realistic SELECTaCOM FM 3-channel 3-station wireless intercom system, model 43-218B. It is designed for audio intercom communication with 3 channels and This system is ideal for home security and door entry systems, providing a reliable and functional intercom solution for various household needs. All 3 turn on When plugged in to the electrical outlet. Was tested on all 3 channels.