So, what exactly is the Fire TV Stick 4K and is it really worth paying $24.99 to get this device? For those who don’t know, it’s basically an upgraded media streaming stick that supports 4K content. Similar to the previous Fire TV stick, it features an 802.11ac Wi-Fi chip as well as a 1.7GHz quad-core processor. Costing less than $50, getting one of these devices will definitely not break the bank!