Clear & Easy FM Signal Broadcasting. The FlexSMART SP4 utilizes an enhanced FM transmitter allowing you to listen to your device's music through the car stereo. Sound output has been optimized to deliver crisp highs, full mids, and deep lows that provide audio quality that is unsurpassed among FM Transmitters.The clear LCD display and easy to use frequency finder makes tuning into your music simple! The SP4 is equipped with an advanced voice detection microphone making it easy to use your phone while driving. The handsfree technology allows the user to make and receive phone calls through their car speakers. Versatile Mounting Options. The FlexSMART SP4 can be mounted on dashboards, windows, and more with the included suction cup or dash board stick pad. Combined with an adjustable arm and 360? rotating head, the SP4 has an endless amount of viewing angles and options!Innovative USB Charging PortThis FM transmitter is equipped with a USB charging port, allowing you to charge nearly any device.* The FlexSMART SP4 is your complete In-Car solution for mounting, charging, superior audio playback, and handsfree calling!Fits devices up to 2.85" in width. Compatible With -Apple - Touch , Classic ( All Generations ). Coby - MP757 , MP767 , MP768 , MP815 , MP826 , MP827 , MP828 , MP837. Philips GoGEAR Ariaz , Connect. Samsung Galaxy Player - 4.2 , 4.0 , 3.6. SanDisk - Sansa Fuze. Zune HD. And Many More!*1A; Some may require OEM USB Mini, 30-Pin or Lightning Cable to charge.