IK Multimedia iLoud, Portable Stereo Speaker with Bluetooth, Total power: 40 W, Frequency range: 50 - 20,000 Hz, Four Class-D amplifiers, DSP controlled, Neodymium 3"" woofer, Neodymium tweeter, Bass reflex opening on the back, Microphone / Instrument input: 6.3 mm jack, The signal can be forwarded to an