U.S.-based technical support Patent-pending universal remote comes with free U.S.-based technical support available Monday-Friday, 7AM-8PM Central Time to assist with any questions or issues; online step-by-step programming videos are also availableReplacement universal remote for five popular TV brands Includes preprogrammed TV device buttons for Samsung, LG, Sony, Vizio and Roku TVs simply press the TV device button that matches your TVs brand; requires two AAA batteries (not included)Preprogrammed for Roku boxes AUX device button comes ready to operate Roku boxes no programming required; programmable for use with a different deviceSimple setup AUX device button can be programmed to operate another device using auto code search or direct code entry; master volume control, once activated, lets you adjust the audio no matter which device is being usedMulti-device control Operate Samsung, LG, Sony, Vizio and Roku TVs, as well as one other device, such as a Blu-ray/DVD player, cable/satellite receiver, streaming media player, soundbar and more