Marshall Middleton II Black & Brass Put your playlist through its paces. Featuring 30+ hours of portable playtime and a durable build, Middleton II prefers life on the road. With 360° sound thanks to True Stereophonic, you won't miss a beat from anywhere you stand. Adjusting the bass and treble is also simple thanks to the Marshall Bluetooth app and tactile controls on the top panel of your speaker. 30+ hours playtime: Play music wirelessly for over a day True Stereophonic: 360° sound that finds you wherever you're standing Dust & waterproof: Able to handle knocks, dirt, and water Multidirectional control knob: Change the volume and music in one place Charging bank: Use the speaker to charge your phone on the go Built-in microphone: Make and receive hands-free calls with clarity Bluetooth: Y Depth: 230 MM Height: 110.3 MM Width: 98 MM Components: Y Digital Recorder: N Radio System: N Surround Sound: N Wifi Enabled: N 30+ HOURS OF PORTABLE PLAYTIME TRUE STEREOPHONIC DURABLE, DUST & WATERPROOF (IP67) MULTIDIRECTIONAL CONTROL KNOB CHARGING BANK BUILT-IN MICROPHONE