
I ordered these to turn off all the TVs in the house when the kids leave them on. Using the original remote controls, I programmed four buttons into power buttons for TVs of various brands. I had to reprogram a few of them again after they seemed to remember the wrong code. This helps to program the remote control in a darkened room so that flickering ambient light (e.g. fluorescent lamps) does not interfere. The only downside is that when the lights are off it's hard to see how you're holding it.

Kohree 36V To 12V DC/DC Converter Regulator - 10A 120W Golf Cart Voltage Reducer
17 Review

TV Tuner LUMAX DV-2120HD
15 Review

Dorhea LM2596 DC-DC Buck Converter Step-Down Regulator 4.0-40V To 1.25-37V DC 36V To 24V To 12V To 5V Volt Power Supply Module With LED Voltmeter Display Compatible With Car Motor Buck
16 Review

EXuby Digital Converter Box For TV With RF/Coaxial And RCA Cable For Recording And Viewing Full HD Digital Channels Free (Instant Or Scheduled Recording, 1080P HDTV, HDMI Output, 7 Day Program Guide)
12 Review