4pcs PC817 4 Channel Optocoupler Isolation Board Voltage Converter Adapter Module 3.6-30V Driver Photoelectric Isolated Module 817 Voltage Isolation Module home2023 stimulates reflex zone points and

stimulates reflex zone points and effectively relieves "heavy legs"

Axle Nut Impact Grade Socket for Easy Removal (1-5/8 Socket)

avoiding secondary injuries and skin trauma

Made of ultra-soft coral fleece

Double End Double End in one

4pcs PC817 4 Channel Optocoupler Isolation Board Voltage Converter Adapter Module 3.6-30V Driver Photoelectric Isolated Module 817 Voltage Isolation Module home2023 stimulates reflex zone points and4pcs PC817 4 Channel Optocoupler Isolation Board Voltage Converter Adapter Module 3. 6 30V Driver Photoelectric Isolated Module 817 Voltage Isolation Module PC817 Optocoupler Module can achieve an interface with a voltage level of 3. 6 24V controlled by 3. 3V or 5V. After the control terminal is connected, the controlled terminal will also be connected. Strong photoelectric isolation and anti interference ability. Later, it can drive high power