This is a National (now Panasonic) intercom master unit. Model number: VL-469G I received this as a gift and have been storing it. It is a junk item, and its operation has not been confirmed. Please be aware that it may be defective and is intended for those who can disassemble and repair it themselves. #Click here for a list of Kotakota's other items for sale ★Yu-packet Post ⇄ Nekopos May be changed without notice. ★I am not an expert, so I may not be able to answer detailed questions. ★Basically, these are used items stored at home, so there may be signs of use, dust that cannot be removed, dirt, and minor scratches or stains that may not appear in the photos. If you are concerned, please ask in the comments section beforehand. ★Everything in the images is included. ★Please be sure to read my profile, and I hope you will also take a look at my other items for sale.