For transmitter:
1. Rechargeable battery, voltage is input via type-c terminal;
2. Low battery indicator light;
3. 4 rocker switches;
4. Wireless transmitter.
For receiver:
1. Use car battery as input voltage and connect a high-power fuse in series;
2. Can control 4 relay outputs with a rated current of 30A and have indicator lights;
3. Detect 4-way load power circuit;
4. Detect input battery voltage circuit;
5. Wireless reception.