this item Smart IR Remote Controller:with IR 38KHz,user can use mobile phone app to control air conditioners, TVs, fans, DVD players, STBs, TV boxes, infrared devices Voice Control:Compatible with Alexa and Google Home for simple, hands-free voice control, such as ""next channel on TV".; widely compatible with a range of devices; for full list, check the list in Smart Life app. App Remote Control：Remote Control your home appliances by using “Tuya Smart” App in your smart phone anywhere anytime. For example: Switch on home A/C in advance, enjoying the comfortable temperature once you get home.