Choiix Boom Boom. System type: 1.0 system, Recommended usage: universal, Speaker placement: Portable. RMS rated power: 4 W, Frequency range: 410 - 20000 Hz, Signal-to-Noise Ratio (SNR): 80.9 dB. Connectivity technology: Wired, Speaker interface type: USB, Headphone connectivity: 3.5 mm. Width: 160 mm, Height: 12 mm, Weight: 0.115 kg. DC input voltage: 5 V