Fangrui Product Details 1. Onboard Mature And Stable Esp32-wroom-32e Module, Large-capacity 4m Byte Flash; 2. The I/o Port And Uart Program Download Port Of Esp32 Module Are All Led Out, Which Is Convenient For Secondary Development; 3. Power Supply Voltage Dc5v/7-30v; 4. Onboard Esp32 Module Io0 Programmable Button And Reset Button; 5. Esp32 Supports The Use Of For Arduino Ide Development Tools, And Provides Reference Programs In The For Arduino Development Environment Product Selling Point 1: Wide Range Of Applications 2: Simple To Use 3: Small Size 4: Stable Performance 5: Long Service Life Product Description: Esp32 Eight-way Relay Development Board Is Equipped With Esp32-wroom-32e Wifible Module, All I/o Ports Are Led Out, And Supports Dc5-30v Power Supply Mode. It Is Suitable For Esp32 Secondary Development And Learning, Smart Home Wireless Control And Other Occasions. Onboard 8-way 5v Relay, Output Switch Signal, Suitable For Controlling Loads With Working Voltage Within Ac 250v/dc30v. 1 Programmable Led And Relay Indic