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An Eight-channel relay board with a wireless RF interface that can be controlled by a wireless remote
and the temperature compensated precision current sources for the loop compensation and the fault protection circuitry
SMD resistors in the 0805 package have a greater voltage rating
It's a 12V 4CH Channel 443MHz Wireless RF Remote Control Relay Switch With Remote
Model KBP310
Door Lock Magnet Proximity Sensor (Reed Switch) Common Cathod An Eight-channel relay board withThis magnetic door lock sensor is easy to use. A magnet and a magnetic sensor are included (the one with two wires). The sensor contains a simple reed switch that is triggered when a magnet is present. Install the magnet on the door window and the magnet sensor on the door window frame to use the sensor as a door window lock sensor. This sensor is ideal for door lock sensors, drawer lock sensors, Window Lock Sensors, encoders, and other general magnet
US$ 12.95
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