test whether it is NPN or PNP

dark red 2

When you are connected this way

4) Low-battery detection

Product brand: Cute room/ zhiqu house

Adjustable Mini Pet Heater with Lamp Socket | Warm Air Conditioner for Small Animals Details:Pink (100–200W) test whether it is NPNMini Pet Heating Air Conditioner for Small Pets Product Description: Keep your small pets warm and comfortable during cold weather with this compact pet heating air conditioner. Designed for small animal enclosures, it features adjustable temperature settings, an energy efficient heating system, and a standard lamp socket for easy installation. Ideal for hamsters, hedgehogs, squirrels, and other small pets. Features: Three level adjustable temperature