1pcs Jue-Fish Anti-Freeze Instrument In Winter Home Cold And Cold Self-Heating Warm Hands Portable Anti-Freeze Instrument Our antifreeze instrument includes PLC， relay group， high voltage package. It can emit electromagnetic interference， effectively repel all kinds of pests. Its use method is very simple: 1. Open the instrument switch; 2. Put the instrument in a safe and stable place at home; 3. The electromagnetic molecular interference released by the instrument can melt snow and ice or allow pests to escape. Under the dual action of electromagnetic composite bands and active electrons， the ice and snow on the roof quickly melted. Even if the house is exposed to prolonged blizzard conditions， it will not freeze or be covered in snow.