The AllPoints Foodservice Parts & Supplies 1381223 Temperature Alarm is designed for reliable monitoring of walk-in coolers and freezers. This flush, wall-mounted unit features an internal buzzer and a visual light indicator to alert you to temperature fluctuations. It operates within a temperature range of -40°F to 230°F, ensuring comprehensive coverage for various storage conditions. The alarm requires a temperature probe (not included) for accurate readings and connects to a standard 120v AC power supply, making it a practical choice for maintaining optimal food safety.