This app uses your cell/tablet's built-in IR blaster (infrared LED) - 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"-8.4" owners! Your tablet has portrait (not landscape) screen, but the IR transmitter is located on left or right side of your tablet (not on top side). So, if you holding your tablet in portrait mode then please don't forget to point your tablets IR transmitter's led (IR-blaster) directly at the TV ! Disclaimer/Trademarks: Vizio is a trademark of Vizio Inc. This app is NOT affiliated with or endorsed by Vizio. Warranties: This free software is provided ''as is'' and any express or implied warranties, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose are disclaimed. In no event shall author be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of the use of this software, even if advised of the possibility of such damage.