Built for life on the road, the Stockwell is the smallest travel speaker made by Marshall today. This portable active stereo speaker weighs just 1.20 kg, which means itll go wherever you want it to. Rechargeable lithium-ion batteries are built into the Stockwell, which give it 25 hours of playing time. The stockwell packs a sonic punch, with two 2.25 inch woofers and two class d amplifiers, making it the loudest speaker in its class. Volume, bass and treble can be adjusted quickly and easily with the retractable analogue control knobs located at the top of the speaker. Using the stockwell to receive and end phone calls is a breeze, just tap the phone button on the control panel to answer, or tap it again to end a call. Bluetooth 4.0 technology and a 3.5mm input means connecting your listening device is super easy. Stockwell features a handy USB port to charge your listening device while youre on the go. You can also use stockwell for conference calling with the phone button on the control panel. 5 speakers. Compatible with iPod, iPhone and iPad. Bluetooth compatible. 3.5mm AUX in. 2 amplifier channels. Frequency 50Hz-20000Hz. General information Size H14, W26, . Model number 4091452. Mains operated. Power from USB. USB cable included. Batteries required 1 x Li-Ion batteries (included) . Battery life 25 hours. (not included). Manufacturers 2 year guarantee.