Sonos Roam - Black - Wireless Portable Bluetooth Speaker- used 2 times! Brand Sonos Speaker Maximum Output Power Connectivity Technology 2E+1 Watts Bluetooth, Wi-Fi Audio Output Mode Input Voltage Mounting Type Stereo 5 Volts Tabletop Mount • Enjoy up to 10 hours of astonishing sound with this portable speaker. Stream music and more over WiFi at home and listen on the go with Bluetooth. Easily control the sound with the Sonos app, your voice, and Apple AirPlay 2.