Conceptronic NUNZIO Wireless Bluetooth Speaker, grey, 3 W, 150 - 20000 Hz, 85 dB, 1%, 400 mV, Wireless Conceptronic NUNZIO Wireless Bluetooth Speaker, grey. RMS rated power: 3 W, Frequency range: 150 - 20000 Hz, Signal-to-Noise Ratio (SNR): 85 dB. Connectivity technology: Wireless, USB connector type: Micro-USB. Product colour: Grey. Recommended usage: Universal. Battery type: Built-in battery, Power source type: Battery, Battery capacity: 300 mAh