Polk Audio Hampden AM6510-A Bluetooth Speaker System with aptX Audio Streaming Bluetooth aptX technology for high-fidelity streaming with compatible devices Backward-compatible with regular Bluetooth Wireless range: 40 feet / Frequency response: 50-22,000 Hz Total system power: 80 watts (2 x 30W + 2 x 10W) USB port for music playback (8-ft. cable included) / Stereo minijack input for connecting an audio source (cable included)