The ABC Search function on the Clarion Bluetooth Receiver With USB lets you list up the names of Songs and Artists stored on your iPod that start with the alphabet letter you choose. Clarion M502 Marine MP3/WMA Receiver with USB and Bluetooth: * 45W x 4 MOSFET built-in amplifier * USB/MP3/WMA playback * Built-in Parrot Bluetooth Interface (HFP, HSP, A2DP, AVRCP) * Built-in microphone and external microphone ready with optional RCB199 * AM/FM Radio * Clarion Marine Receiver MP3/WMA is Sirius/XM-ready * Subwoofer volume control on the Clarion Bluetooth Receiver With USB * Built-in high and low pass filters * Magna Bass EX dynamic bass enhancement and 3-band parametric equalizer * Beat EQ Plus for sound adjustment * OEM steering wheel remote ready * 4-channel/2V RCA output (front, rear and subwoofer) * A/V inputs (rear aux) * Pandora Internet Radio station link with USB using Pandora App * Rear USB port with iPod direct connect capabilities