This bundle includes an Alpine UTE-73BT Digital Media Receiver (NO CD), and two pairs of 43CSC654 6.5" Coaxial Speakers. Mech-less (NO CD) AM/FM tuner with RBDS information FLAC/MP3/WMA audio file compatibility via USB Made for iPod and iPhone Android AOA 2.0 compatible Works with Pandora Music for iPhone and Android phones Built-in Bluetooth wireless technology with audio streaming Front USB port and AUX port 1-line, high-contrast LCD display with RGB illumination Three preouts (2V) Built-in 18W x 4 amplifier (at CEA-2006 rating) 24-Bit DAC 3-band parametric EQ High pass/Low pass crossover Steering wheel remote and wireless remote ready CSC 6.5-INCH (160mm) COAXIAL SPEAKERS, 4-OHM CS Series CS65 The CS 6-1/2-Inch Coaxial Speakers are the perfect way to upgrade you factory speakers. Using zero protrusion PEI tweeters and a thick polypropylene woofer ensures you get every bit of clarity you need, without interfering with factory grilles. These CS speakers work best with 100 watts of recommended power. See below for more details. Specifications Speaker Design 2 - way Woofer Size | in [mm] 6 1/2 [160] Tweeter Size | in [mm] 1/2 [13] DC Resistance | ohm 3.3 Peak Power | Watts 300 Continuous Power | Watts, RMS 100 Sensitivity [SPLo] | dB @ 1W, 1m 90 Effective Frequency Range | Hz 40-20k Mounting Hole Diameter | in [mm] 4 13/16 [123] Top Mount Depth | in [mm] 3/8 [9] Bottom Mount Depth | in [mm] 1 11/16 [43] Tweeter Protrusion | in [mm] 0 Grilles Yes Tweeter Magnet Material Neodymium Tweeter Dome Materia PEI [polyether imide Tweeter Design Balanced dome Woofer Cone Material Polypropylene Woofer Surround Material Polyester foam