Honeywell has released the 5800RPS Wireless Recessed Transmitter. At 1/4-inch deep and one-inch long, the 5800RPS is concealed after installation, according to the company.

The Honeywell 5800RPS Wireless Recessed Transmitter.
Installation does not require any wire runs, only a drill, 1/4-inch wood or Forstner bits. The 5800RPS has up to a seven-year battery life depending upon use, and is compatible with Honeywell’s VISTA and LYNX control panels and all 5800 Series wireless receivers and transmitters.