5 Pcs Button Key Module Universal 4 Key Push Button Switch Module Board Keyboard Board for DIY Accessory

WORKING VOLTAGE: DC 1.2V, 1.8V, 2.5V, 3V, 3.3V, 4.5V, 5V, 9V, 12V, 24V, 36V, 48V. WORKING PARAMETERS: GND K1 K2 K3 K4" 4 PIN OUT 2.54mm . 4-button Common Cathode key module(When pressed output low level). HIGH QUALITY: Adopted of high quality electronic components, and precision process, ensure for the durability. APPLICATIONThe 4-key keyboard module is suitable for automatic modification, motor control, bulb, LED string, micro pump, solenoid. USAGE --- 4-key keyboard module can be inserted directly into uno mega2560 due,Ideal for linking up to your UNO Mini Nano Mega2560 Breadboard raspberry pi banana pi etc.