If you have received the electronic Advent wreath from Oberon microsystems, you can use this app to remotely control the four candles (LEDs).
Select the advent wreath, and then tap on the candles to switch them on or off.
If you use the button on the advent wreath itself to switch the LEDs, note how the candles on the iPhone will change accordingly.
The application requires Bluetooth Low Energy which is supported by iPhone 4S, iPod touch 5th generation, iPad 3rd generation or newer.