The C-TECH SPK-310B will tune your music experience up a notch. This speaker model is what's known as being active, which means they have a built-in amplifier and this allows them to play music without needing to connect to other devices. Enjoy the crisp sounds from the frequency of 70 Hz to 22000 Hz. For connecting to other devices to play music, the C-TECH speakers can do so via 3,5 mm Jack. The speakers' power reaches up to 20 W.