1 Channel 12V Relay Module Optocoupler Isolation High Low Trigger for Arduino ESP32 ESP8266 Raspberry Pi, Red Board, 3 Pack

["1 CHANNEL 12V RELAY MODULE: Designed for 12V operation with single channel relay for controlling high voltage or high current devices safely","OPTOCOUPLER ISOLATION DESIGN: Built in optocoupler provides electrical isolation to protect microcontrollers from voltage spikes and interference","HIGH AND LOW LEVEL TRIGGER: Supports both high level and low level trigger selection via jumper for flexible control with different systems","EASY CONTROL INTERFACE: Simple DC plus DC minus and IN pins allow direct connection to Arduino ESP32 ESP8266 Raspberry Pi and other controllers","3 PACK FOR PROJECTS: Includes three relay modules ideal for automation home control robotics and DIY electronics applications"]