i have tried two of these type devices over the past couple of years. both of those left me with a picture that would flash on and off every other second. i gave up trying until a couple weeks back when i thought to try one last time.we needed this for use with a Samsung television with inputs from roku premiere plus, amazon 4K fire stick and alienware pc. the box comes with pretty much everything needed to get going. you will however need your own hdmi cables, two aaa batteries for the remote and a spare usb type A wall plug to power this device, any will do.the device feels well made, sturdy with nothing wrong whatsoever. to start with pop the batteries in the remote. plug the hdmi cable from your television into the port labeled 'output.' connect the hdmi cables from your other devices to the switch. that's it and you are ready to go.as for picture quality on the 4K set i can see no difference from before when these devices had to be connected one at a time to use. the remote does power down/up the unit as well as change which device you want to use for input.the led lights on the front are essentially the same in regards to brightness as is our roku for example. if it bothers you a piece of electricians/black tape will take care of that. or just turn the device to the side so they aren't pointed directly at you.i could not be more pleased with how this purchase has worked out for us, especially after the previous failed attempts with other devices. switches that made the same promises except with this one it actually does what it says it will.i have not found our experienced anything negative so far. the only minor ding would be that i was not aware this required a power brick, as said not included. it would have been helpful to have that information featured more prominently on this page. but for the money and the end results absolutely not a big deal at all.i'm not only happy with this switch honestly i am relieved. after trying for so long to finally have a solution that works, it's great. i can whole heartedly recommend this to anyone with limited hdmi ports on their televisions or displays.
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