EXTRA BASS adds power to every bassline Push the EXTRA BASS button to add some serious low-end power to your music. It works by reinforcing basslines to create deep punchy bass. Simply press the button to activate the mode and be blown away by resounding bass. Two-way design for flexible setup A flexible two-way setup gives you great sound wherever you place the system. Set it up horizontally for a classic boombox feel or flip it upright if you?re short on space. A built-in sensor optimises how sound is processed to stereo sound whichever setup you choose. Seamless streaming with NFC and Bluetooth? Near Field Communication (NFC) and Bluetooth technology remove the need for wired connections and complex set-up sequences. Simply touch your NFC-enabled device to the headphones for a quick seamless connection then start streaming your music collection. No NFC -No problem. Connect via Bluetooth and you?re ready to go. Line and speaker lights create a party atmosphere Pump up the atmosphere with club-like line and speaker light with strobe flash. Synchronising with the rhythm of the beat the power and speed of the light display matches the musical mood and atmosphere One-box design for maximum portability Pick it up and party anywhere thanks to the GTK-XB5?s one-box design. Whether you?re hanging out with friends at home or taking the party elsewhere the compact design features a built-in handle for portability and convenience. Unique to Sony ClearAudio+ automatically adjusts sound settings for an enriching listening experience. By bringing together expertise in digital signal processing technologies ClearAudio+ is able to optimise audio to deliver a consistently clear high-quality sound whether you?re gaming or enjoying. dd extra power to your sound system. Connect multiple stereos in a chain for a higher sound output. Activate one device to be the ?Party Host? and sync music with the other systems in the chain.