Perfect Choice PC-112242. System type: 1.0, Recommended usage: mobile phone/smartphone, Form factor: tabletop. RMS rated power: 2.5 W, Frequency range: 100 - 20000 Hz. Connectivity technology: Wired, Interface: USB/3.5 mm. Power source type: Battery, Battery type: built-in, Battery life (max): 4 h. Width: 70 mm, Depth: 77 mm, Height: 46 mm