https://www.tinyosshop.com/tsir04b-bluetooth-relay?page=10&manufacturer_id=11
TSIR04B - 4 Channel Outputs ,4 optically Isolated Inputs Bluetooth Smartphone Relay
This is a TSIR04 Bluetooth verison relay board with optically isolated inputs and OLED display and temperature sensor port. Very powerful and easy to use.
channeloutputsisolatedinputsbluetooth