Brennan B2 (500Gb, Metallic) B2 uses FLAC compression that&#039;s a lossless compression technique so B2 stores an exact copy of what is on the CD. 500Gb model can store 1250 CDs as FLAC 2Tb model can store 5000 CDs as FLAC - perfect copies of all your CDs forever You can operate B2 from the front panel, remote control or using the fantastic new web UI. The web interface lets you control the B2 from your sofa with a laptop, tablet or smartphone and will transform the way you enjoy your music. Internet radio - currently over 40,000 stations Optical SPDIF output on the back so you can deliver the music to a high end DAC or high end audio equipment for uncompromised audio quality B2 has its own 15+15W power amplifier with chunky 4mm plugs Bluetooth In - so you can play music from Spotify etc. on your phone or tablet through the B2 B2 is machined from solid aluminium. You can backup and transfer music with an external hard disk so your music is safe HDMI Out so you can play B2 through your AV Receiver or Home Cinema Works with your Sonos system Control B2 from your laptop, tablet or mobile phone. Find music in seconds. Explore your music collection as easily as surfing the web. Build playlists easily.