Philips Fidelio E5 Wireless Surround on Demand Speakers Bluetooth (aptX and AAC) for wireless music steaming NFC (Near Field Communications) technology : Pair Bluetooth devices easily with one-touch NFC (Near Field Communications) technology. Just tap the NFC enabled smartphone or tablet on the NFC area of a speaker to turn the speaker on, start Bluetooth pairing, and begin streaming music. HDMI x2 :Pair Bluetooth devices easily with one-touch NFC (Near Field Communications) technology. Just tap the NFC enabled smartphone or tablet on the NFC area of a speaker to turn the speaker on, start Bluetooth pairing, and begin streaming music. Dolby Digital and Pro Logic II : A built-in Dolby Digital decoder eliminates the need for an external decoder by processing all six channels of audio information to provide a surround sound experience and an astoundingly natural sense of ambience and dynamic realism. Dolby Pro Logic II provides five channels of surround processing from any stereo source. Premium soft dome tweeters: With Philips' Crystal Clear Sound, you will now be able to discern and appreciate every sound detail, the way it's meant to be heard and as the artist or director intended!