4‑Channel Relay Module Control Board Resin Expansion Shield with Onboard Indicator DC5V

Feature: 1. With standard shield interface and shape, users can rest assured to use this module. 2. User can continue to stack other expansion boards without Worrying the safety problems. 3. With 3pcs M3 screw positioning holes on the relay module, it is very easy to install. 4. High drive of this module is 5V or 3.3V, which is normally open contact closure. 5. The on board relay indicator is red, and the status of the relay module can be seen at a glance. Specification: Item Type: Relay Module Control Board Material: Resin Power Supply Voltage: DC5V Relay Model: HJR 4102 L 5V. Package List: 1 x Relay Module Control Board