Packing in a 3D, 4K screen and one of the smartest operating systems about - Android TV - the Sony KD55X8509CBU demands a closer look.

4K Ultra HD TV b the ultimate in detail
With its revealing screen resolution of 3840 x 2160 pixels, the Sony KD55X8509CBU is ready for the 4K UHD revolution. The resolution is four times greater than conventional 1920 x 1080 Full HD, and it's a difference you'll really notice. The gain in resolution is especially visible and even close up, the detail and realism are awesome. Even other resolutions, thanks to Sony's X-Reality PRO 4K technology, are upscaled to near 4K standard.

Triluminos display and Motionflow XR1000Hz
As well as 4K, this Sony TV also boasts a Triluminos display, developed to produce truer, deeper and more natural shades of colour, with skin shades appearing far more natural. It's also fitted with Motionflow XR 1000Hz, which works especially well with fast moving action, such as sports events, removing the blur you can see with standard TVs. From a Hollywood blockbuster to a Formula One race, XR1000 makes a significant difference.

Active 3D for a thrilling experience
Once you've experienced 3D TV, ordinary TV just never seems quite the same. Images aren't just projected forward but appear to occupy the space behind the screen, too. Thanks to 3D active processing, the Sony KD-L55X8509CBU offers breathtaking levels of detail and realism.

Android TV
Offering the slick interaction of the best smartphones, Android TV is one of the smartest content managers and providers to date. Boasting features such as Google Cast, Google Play and Voice Search, this Sony is part TV and part giant smartphone.

Voice Search and One Flick Entertainment
Even with such a massive range of content, finding what you want is always easy. Voice Search means you simply say what you're looking for and let Android TV find it for you. Alternatively, one-flick entertainment gives effortless control of search functions via simple swipes on the remote's touch pad. Best of all, you can control all the major functions without your TV viewing being interrupted - thanks to the discreet pop-up menus.

Bass reflex speakers and Signal to Sound architecture
Although no match for a home cinema system or soundbar/base, the Sony KD55X8509CBU's sound system is one of the better ones. With bass reflex speakers, it offers a deeper and more powerful sound than you might expect. The digital Signal-to-Sound Architecture processing system includes technologies such as S-Force Front Surround for a more spacious sound, while Clear Phase produces a more natural sound quality.

If you're torn between the visual thrills of 3D and 4K TV then worry no more; with the Sony KD55X8509CBU you've got them both - and a lot more besides!

Refurbished models are products returned to Sony under the following circumstances: change of mind, faulty out of box, box damage or minor cosmetic imperfections. These products will be fully tested and repaired where necessary by an authorised repair centre. Whilst many of these products will be in as good as new condition, we cannot guarantee refurbished products sold will be delivered in the original packaging and may have minor cosmetic imperfections such as scratches, marks or discoloration. All refurbished products come with a minimum 12 months manufacturer's warranty.