Masterpiece Signature Series MPC-4225 Portable Bluetooth Amplifier (Blue) Stream music from any Bluetooth enabled device (i.e. smartphone, tablet, laptop)Play music from TF or Micro SD Card Aux input allows MP3, CD or TV Monitor input for stereo sound via mini 3.5 mmOn/Off Switch Output power 2 x 40w (rms) Built-in 5000mah polymer battery Wireless range: max. 100 ft. line of sight (No shield rate actual range depends on the Bluetooth-enabled Device)Supported Bluetooth Profiles: HFP, A2DP, AVRCP Weight: 09kG (Contain battery and power adapter) Frequency response: 20 Hz - 20 kHz Dynamic range: type. 95 dB Total harmonic distortion (T H D+N): 0.04 % at 20 W 1 kHz