Mic input. Built in FM radio tuner with memory presets (Radio requires an aux cable to be plugged in to get reception). Volume control, bass, treble, mic volume control, and echo control knobs. Frequency response: 40HZ 18KHZ. 6.5 woofer and 1 tweeter built in. On-the-go system is perfect for the beach, bedrooms, bathrooms, work, computer speaker, and more. Enclosure is made of high quality ABS material that is very durable and can take a good beating. No distortion even at max level listening!. Digital LCD display screen. Built in highly efficient amplifier puts out a lot of power and draws very little current from the battery. Metal grille to protect the speakers. Distortion: ?0.5%. Unit dimensions in inches: 10.12 x 13.82 x 7.4. Unit Weight: 5.9 LBS. Shipping Dimensions in inches: 12.6 x 10.2 x 14.57. Shipping Weight: 8.16 LBS. 90 day money back guarantee! If you are unhappy with this product we will send you a label and take the item back and give you back all of your money (The item must be complete with all original packaging and accessories)