Built for life on the road, the Stockwell is the smallest travel speaker made by Marshall today. This portable active stereo speaker weighs just 1.20kg, which means it will go wherever you want it to. For added protection, Stockwell comes with a multi-functional flip cover. It is also the loudest speaker in its class! Stockwell uses Bluetooth technology to deliver seamless wireless music play. It also features a handy USB port to charge your listening device while you're on the go. The Stockwell packs a sonic punch, with two 2.25inch woofers and a two-channel class d amplifier, making it the loudest speaker in its class. 2 internal speakers. Compatible with iPod, iPhone and iPad. Bluetooth compatible. 3.5mm AUX in. 20 watts. 2 amplifier channels. Frequency 50Hz-20000Hz. Bass reflex. General informationSize H26, W14, D4.1cm. Speaker diameter 5.72cm. Power from USB. Batteries required 3 x Li-Ion batteries (included). Battery life: 25 hours.