Sonos Boost Smart Wireless Speaker Transmitter Extender White The Sonos Boost is a square-shaped smart speaker transmitter in white color. It belongs to the 5.1 system configuration and model BoostUS1. It offers wireless and Bluetooth connectivity options. The product is brand new and unopened, providing a seamless audio experience for your home entertainment system. New open box Features: • Wireless Speaker Condition: New Without Box