A:Answer Hi, Tim. Thank you for inquiry! Yes, you can set the sleep timer with Alexa on the Insignia™ - 43" Class F30 Series LED 4K UHD Smart Fire TV. However, to initiate Alexa commands, you typically need to press and hold the microphone button on the remote to activate Alexa voice control. Once activated, you can then give commands to Alexa, including setting a sleep timer. As of now, there may not be an option to set it up to respond to Alexa commands without pressing the microphone button. Keith | Insignia Support https://www.bestbuy.com/site/insignia-43-class-f30-series-led-4k-uhd-smart-fire-tv/6562495.p?skuId=6562495