Feature: 1. Anti Interference: Relay module has an optocoupler isolation components with high interference resistance and very helpful.2. APP Control: This relay module sends commands via APP to control the relay to turn on and off. For APP is provided, you can also control the relay with your own APP by sending a simple command. 3. Light Weight: This relay module is light weight, portable and easy to install, Suitable for IOS and for 4.0 and for 5.0. 4. Short Response Time: Our 4 channel relay module has diode current depletion protection and short response time. 5. PCB Material: The relay module has an adjustment distance of 10 meters without obstruction and is made of PCB material with exquisite craftsmanship, safety and practicality and long service life. Specification: Item Type: Relay Module Package List: 1 x 4 Channel Relay ModuleNote: Match the appropriate model type before use.
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