Product Details Fangrui Product Details Features: 1. Onboard And Stable Esp07 Wifi Module, Large Capacity 4m Byte Flash 2. The I/o Port Of The Wifi Module And The Uart Program Download Port Are All Lead Out To Facilitate Secondary Development; 3. Onboard Ac-dc Switching Power Supply Module, The Power Supply Mode Supports Ac90-250v/dc 7-12v/usb5v, Onboard 1 Channel 5v Relay, Output Switching Signal, Suitable For Controlling Loads With Working Voltage Within Ac250v/dc30v 4. Onboard Wifi Module Reset Button, Onboard Power Indicator Light, 1 Programmable Led And Relay Indicator Light, 5. Esp07 Supports The Use Of Development Tools Such As Eclipse/for Arduinolde And Provides Reference Programs For The For Development Environment. Description: Product Name:relay Module Board Size: About 80 X 50mm Material: Pcb Colour: As Shown Package Contents: 1 X Relay Module 2 X 6pin Double Row Of Pins 1 X 6pin Single Row Of Pins 1 X Short Circuit Cap Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays