Mini Relay Shield 5V Relay Module for WeMos D1
Features:

Operating Voltage : 5V (Gets power from WeMOS Board)
Voltage and Current Rating: 10A @250VAC
Optical Isolation: No / Non Isolated
Relay Drive IO: D1
Support OTA; 11XI / O pins; 1XADC pin (input 0-3.3V)
NO: 5A(250VAC/30VDC), 10A(125VAC), MAX:1250VA/150W
NC: 3A(250VAC/30VDC), MAX:750VA/90W
Compatible with Arduino, use for Arduino IDE for programming
Pin definition: Rrelay module VCC and GND are connected to the motherboard, and the data IO port is D1.
Package included:
10pcs * Mini Relay Shield