5Pcs 2 Channel Relay Module SMS GSM Remote Control Switch SIM800C STM32F103CBT6 for Greenhouse Oxygen Pump Smart H Shaving & Hair Removal Brand No/A Model KT0021 Quantity

Brand No/A Model KT0021 Quantity 1 Piece Material FR4 English Manual / Spec No Other Features KT0021 is a development kit

Stylish Design: This professionally crafted aluminum hub effectively saves your desk space and expands your connectivity devices

all parts can be easily put into the package

More comfortable

5Pcs 2 Channel Relay Module SMS GSM Remote Control Switch SIM800C STM32F103CBT6 for Greenhouse Oxygen Pump Smart H Shaving & Hair Removal Brand No/A Model KT0021 Quantity5Pcs 2 Channel Relay Module SMS GSM Remote Control Switch SIM800C STM32F103CBT6 for Greenhouse Oxygen Pump FZ3064 Package List: 5 X 2 Channel Relay Module SMS GSM Remote Control Switch SIM800C STM32F103CBT6 Use process 1. Insert SIM card 2. Connect the controlled equipment 3. Connect power supply 4. Waiting for equipment to start ready 5. Change the Authorization number (if the device does not have the correct number) 6. Send command to control the