CentIoT - Illuminated LED SPST ON/OFF Push Button Round Rocker Switch - 4.8mm terminals Round Bottom - for Car Boat Auto Van LED Lamp Dash Light - (220V 5A Red LED, 3PIN) AR007-UNOR3-CH340-RDYN There are also two potentiometers

There are also two potentiometers on the board and one jumper (see picture)

Power indicator (green)

and it’s got space to mount through-hole and surface mount integrated circuits

Excellent noise suppression in the case is not connected to the input audio

14cm USB A Type Female to USB B Type Mini Male 5 Pin Adapter Cable

CentIoT - Illuminated LED SPST ON/OFF Push Button Round Rocker Switch - 4.8mm terminals Round Bottom - for Car Boat Auto Van LED Lamp Dash Light - (220V 5A Red LED, 3PIN) AR007-UNOR3-CH340-RDYN There are also two potentiometersBrand: CentIoT Color: Red Features: Rating: 120V 10A, 250V 5A Mounting hole diameter: 20 22mm Poles: SPDT (Single Pole Double Throw) Terminal: 3 Pin(NC COM NO) Contact Resistance: 35m max. PartNumber: SW13 RNDB 3P RL Details: Rating: 220V 250V Mounting hole diameter: 20 22mm Poles: SPDT (Single Pole Double Throw) Terminal: 3 Pin(NC COM NO) Contact Resistance: 35m max. Insulation Resistance:100M at 500VDC Dielectric Strength: 1500VAC for 1 minute