4 Channel Relay Module Drive‑Free PC Intelligent Switch Controller PCB Board DC 12V
- The module uses advanced technology, does not need any driver, plug and play.
- Use imported high‑performance USB control chip, onboard square USB interface, stable connection.
- Use the special relay drive chip ULN2803, the relay work is more stable and can be used for a long .
- With strong compatibility, support for WIN7/XP 32‑bit/64‑bit system, easy to use.
- The board power socket and terminal are connected to the power source. After the power is connected, the relay can maintain the setting state even if the computer is turned off.
