Bluetooth® powered on the AVRCP/A2DP audio-streaming profiles with weatherproof handlebar mounted control The internal amplifier circuits have been frequency-tuned to reduce distortion and improve high speed performance Flexible mounting options include handlebar clamps with bushings to fit 7/8, 1 & 1-1/4 diameter handlebars, along with mirror mounting bracket plates High-impact high-temp polycarbonate speaker enclosures 50-15 kHz frequency response Lightweight Neodymium magnet material 120 W Max - 44 W RMS: 22x2 @ 5% Total Harmonic Distortion (THD) -