Enjoy powerful bass and clear vocals wherever you go with the Sony ULT Field 3. ULT POWER SOUND and the ULT Button deliver deep, boostable bass while Sound Field Optimisation keeps music balanced indoors and out. The compact, easy-to-hold design with adjustable shoulder strap is water- and dust-proof for worry-free transport and use. Bluetooth wireless playback, hands-free calling, Party Connect to sync up to 100 speakers (combine two for wider stereo), and the Sony Sound Connect app with 7-band EQ. Up to 24 hours battery life with USB-C quick charge (10 minutes = 2 hours playback).