Warranty – Sound Storm Laboratories provides a powerful 3-year platinum online dealer warranty so long as the purchase is made through . We strongly encourage professional installation of this product to ensure proper and safe functionality. Specs - Dimensions: 3” x 7” x 2”, Weight: .75 Lbs. Power - You can get 50 watts x 4 Max power from the ML43B to power your speakers. An amplifier is recommended to make sure your speakers are well powered. Equalizer - Customize how you want to hear your music with the balance / fader / bass and treble and control it all with the wireless remote control from either inside or outside of your vehicle. Outputs - Use front & rear pre-amp outputs to hook up your speakers (front left / front right and rear left / rear right). Auxiliary - Compatible with the audio output from smartphones as well as MP3 players. Just plug in and start playing. Inputs - USB, SD, Aux, USB charging. Media Playback - Use the USB & SD ports to enjoy your top selected music and audio books. Digital media support include MP3 file format. Tune into the AM/FM radio stations for up to date music/news/sports and more. Bluetooth - Answer/make calls and be hands-free with no distractions. The built-in microphone picks up your voice and your car speakers let you hear the person on the other side. Play and control your music and apps like Spotify/Pandora wirelessly.