<p>Features: 1. Onboard And Stable Esp07 Wifi Module, Large Capacity 4m Byte Flash</p> <p>2. The I\/0 Port Of The Wifi Module And The Uart Program Download Port Are All Lead Out To Facilitate Secondary Development; There Are 4 Channels Of 5V Relays On The Board, Which Output Switching Signals And Are Suitable For Controlling The Working Voltage. Loads Within AC 250V\/DC30V</p> <p>3. Onboard Ac-Dc Switching Power Supply Module, Power Supply Mode Supports AC90-250V\/DC7-30V\/5V</p> <p>4. Onboard Wifi Module Reset Button; Onboard Power Indicator Light, 1 Programmable Led And Relay Indicator Light</p> <p>5. ESP07 Supports The Use Of Development Tools Such As Eclipse\/for Arduinoide And Provides for Development Reference Procedures In The Environment</p> <p>Description:</p> <p>Product Name:Relay Module</p> <p>Board Size: About 93 x 87mm</p> <p>Material: PCB</p> <p>colour: As shown</p> <p>Package Contents:</p> <p>1 x Relay Module</p> <p>1 x 6Pin Double Row Pin</p> <p>1 x 6Pin Single Row Of Pins</p> <p>1 x 4Pin Single Row Of Pins</p> <p>5 x Short Circuit Cap</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>