Scienceware* Freez Guard* Alarm

Guard Alarm monitor freezers and coolers and detects any variance from temperatures between -20° and 13°C (-4° to 55°F), ±1%, which are preset by the user. The resonant alarm will continue to sound for up to three days if the temperature falls out of the preset range. Should the temperature correct itself, an LED will indicate that a variance has occurred. The alarm can be reset manually. A beep signals when the 9V battery (not included) is low. For added protection and extra life, a second battery can be connected. The unit mounts with self-adhesive tape or screws. Probe has a three meter (10 foot) wire. 3 5/16 x 5 1/16 x 1 1/2 in. (W x H x D).