Products from the USA may come with an input voltage of 110V–120V, requiring a step-down transformer. Check the device wattage to select the correct power converter.
•2 Pieces of Keypad 1x4, 4 keys
•Membrane matrix keypad
•Removable adhesive paper on the back => easy to stick on the flat surfaces
•Keypad for Arduino, ESP32, ESP8266, Raspberry Pi, or any 5V or 3.3V microcontroller.
•Tutorials for Arduino, ESP32, ESP8266 are provided
