Two pairs of chrome 3" full range speakers 1000 Watt max amplifier with wired remote volume control Bluetooth Audio Streaming - stream your favorite music or music service like Spotify or Pandora wirelessly One pair RCA inputs, 3.5 mm aux input Compatible with Audio Output of Smartphones and MP3 Players Frequency response 80Hz to 15KHz, SN >85dB, THD: 0.01 Includes mounting brackets adjustable to fit 3/4" to 1-1/4" handlebars