Marshall Stanmore II is the most versatile speaker in the Marshall line-up and is perfect for any room, big or small. It delivers on the promise of high-performance sound that is synonymous with the Marshall name. Stanmore II produces clean and precise Audio, even at the highest levels, due to advanced components such as two 15 watt class D amplifiers powering its tweeters and a 50 watt class D amplifier to drive its mighty subwoofer. With Bluetooth 5. 0 and Qualcomm aptX technology you can play your music in glorious, stereo sound with no wires required. Controls and Connectivity: Top Panel Controls Source button,Volume control knob,Bass control knob,Treble control knob,Play/Pause button,Power lever