Line-shape diffuser spreads sound further. IP67 Water resistant dustproof and shockproof. X-balanced for a distortion-free sound. Ambient noise sensing. Multipoint connection pairs two devices at once. Echo cancelling and mic mute button. Party connect syncs up to 100 compatible speakers. Use with Sony Music Center App. Dual passive radiators. Battery life up to 24 hours. Quick charge up to 70 minutes with 10 minute charge. Type-C USB port. Dimensions: 4.133" x 9.370" x 4.685".