INTRODUCING THE ULT FIELD 7: A portable, highly durable ULT POWER SOUND speaker, delivering superior sound pressure, deep bass, and crystal-clear detail, at home or on the move POWERFUL SOUND, ULTIMATE BASS: With two X-Balanced Speaker Units, two tweeters, and two passive radiators, enjoy superior sound pressure, deep bass, and crystal-clear quality – even at max volume HIT THE BUTTON, FEEL THE BASS: Unleash its true potential with the ULT button sound modes - Deep Bass adds weight to the lower frequencies, Attack Bass adds unparalleled sound pressure and energy CLEAR SOUND, EVEN IN NOISY ENVIRONMENTS: Featuring Sound Field Optimisation, the Bluetooth speaker will automatically adjust its audio to remain clear and detailed, despite surrounding noise LONG BATTERY LIFE: With a 30-hour battery life and a quick charging feature that provides 3 hours of playback from just a 10-minute charge, you’ll never be without music for long