IS Icstation 3V 1 Channel Relay Power Switch Module with Optocoupler High Level Trigger for ESP8266 Development Board (Pack of 5) : Amazon.in: Industrial & Scientific
2/5/10pcs Mini Relay 3V DC 10A High Current Power Relays SRD-3VDC-SL-C PCB Type Relay5 Pins Mayitr Electrical Control Device - AliExpress
Teyleten Robot DC 1 Channel Optocoupler 3V/3.3V Relay High Level Driver Module Isolated Drive Control Board 3V/3.3V Relay Module for Arduino (Pack of 5): Amazon.com: Industrial & Scientific