All TalkTalk TV customers adding a NOW Membership to their package will automatically receive the NOW Boost at no extra cost (normally £6 a month). The NOW Boost lets you stream on up to 2 devices at the same time in HD and ad-free. Full HD requires a compatible device and 1080p HD TV (or higher). The NOW Ultra Boost isn’t currently available to use on any TalkTalk TV box. This boost allows customers to watch in UHD video quality on a small number of channels.