Features: ZeroV Acoustic Technology Enclosure *BluetoothStereo A2dp and AVRCP *High efficiency and performance class D stereo amplifier *High current Battery operated AUDIO POWER AMPLIFIER Power rating: 2.5W Interface: Bluetooth V2.0 Output Power(RMS): 1w+1w Signal-to-noise ratio(SNR): Better than 80dB Controls: 3keys Battery: 220mAH, stand by 120hrs, operation 4hrs Earphone connection: 3.5mm Jack Speaker cnnection: 2*2.5 Jack Dimension: 11(h)*24(w)*80(d)mm Weight: 80g(Approx) LOND-SPEAKER Speaker drivers: 2*33mm Frequency Range: 110Hz~18K Hz Maximum Input: 3Watts Impedance: 8ohms Dimension: 88*41*61mm Weight: 200g Enclosure Material: Transparent Acrylic