National Wireless Call (Wireless Chime) ECE1601 This is a transmitter and receiver set. It is similar to Panasonic's ECE1601P. Matsushita Electric Works Purchased in 2000, there is some discoloration, but operation has been confirmed. A name sticker is attached to the receiver. (Entrance, Toilet, Bathroom, Grandma, Reception, Tea) For the doorbell at the entrance For calls in nursing care For calls from the bathroom or toilet *The back cover of the transmitter (the side that presses the chime) is missing. *There is no instruction manual, so please check online, etc. Wireless Ping Pong - Model: ECE1601 - Brand: Wireless National - Function: Wireless Call Thank you for viewing.