This app uses your cell/tablet's built-in IR blaster - no additional hardware is needed. Supported devices: HTC One M7/M8, LG G3 Stylus, Lenovo Lifetab, TCT / Alcatel I221, Samsung Galaxy series like S4, S5, Note, Tab, Mega etc. You must point your phone's IR blaster directly at the TV. Usual working range is 3 - 10ft. Nb! Tab3 7"-8. 4" and Tab4 7"-8.