Reliable Surge Protection: BXST voltage surge protector is specifically designed for 120V home appliances. It protects refrigerators, air conditioners, microwaves, washing machines, and more from sudden voltage spikes, brownouts, or surges, ensuring long-term safety and performance. Automatic Induction Protection: Built-in smart voltage detection automatically cuts power when voltage drops below 90V or exceeds 140V, helping prevent damage from power fluctuations, blackouts, or unstable currents. Delay Protection: The 30-second startup delay ensures voltage stabilizes before resuming power to sensitive devices like compressors. LED lights show real-time status: Normal, Delay, Over Voltage, and Under Voltage. Wide Compatibility & Easy to Use:This compact wall-mount surge protector fits most standard outlets and is ideal for air conditioners, ice makers, water heaters, ovens, coffee machines, and more. A must-have for kitchens, laundry rooms, and rental properties. Warranty & Reliable Protection:Backed by BXST's 1-year warranty and responsive customer support. We’re committed to providing safe, durable protection for your valuable electronics—buy with confidence and protect your home with BXST surge protection technology. 1. Over/under voltage: When the voltage exceeds the limit, the power supply will be automatically cut off to prevent damage to the electrical appliance due to excessive voltage or low voltage.