EzRemote turns your iPhone into a universal remote to control your home electronics.
iOS device have no IR hardware, you need an audio to IR accessory to use this app.
This app contains no information about how to use IR accessory, please search internet with keyword "iPhone IR blaster".
If you are looking for IR solution but don't have audio to IR accessory yet, you may want to have a look at my another App FzRemote, it offers much better IR remote control experience.
supported device - Amplifier, Audio, BluRay, Cable, CD, DVD, DVR, FAN, HTiB, IPTV, Receiver, Satellite, STB, TV, VCR.