Mitco C138-4M Cold-Alert Telephone Temperature Monitor
Ideal for snowbirds or vacation homes. Cold-Alert guards homes against freezing conditions that could result in burst pipes or damaged equipment during the resident's absence. Cold-Alert quickly mounts on an existing phone jack. The homeowner phones home. A busy signal means that there has been a significant drop in internal temperature in the home. Mounts on any modular telephone jack. Comes with telephone jack for easy installation. Can be permanently installed - secondary jack permits the use of your phone with Cold-Alert in place. Quick, easy installation. No tools required.