Powerful, portable party speaker with deep bass and clear vocals. ULT POWER SOUND delivers high-volume playback while the ULT Button offers two bass modes to tailor the sound. Rugged, stylish and water- and dust-proof for worry-free use, with dynamic party lighting and an adjustable shoulder strap for easy transport. Up to 25 hours battery life and quick USB-C charging (10 minutes charge = 100 minutes playback). DC output lets you charge devices on the go. Party Connect links up to 100 compatible speakers and two units can form wider stereo. Includes 3.5mm line-in, Sound Field Optimisation for indoor/outdoor listening, and the Sony Sound Connect app with 10-band EQ and custom settings.