FM Transmitter with integrated Car Charger for the HTC Droid Eris - uses Gomadic TipExchange Technology Transmits clear and rich audio for over 30 feet while recharging your HTC Droid Eris Uses Digital PLL sound coding technology to maintain stable and high fidelity sound quality. TipExchange enabled charging port simultaneously powers and recharges your Droid Eris while transmitting the audio Quality backed by Gomadic Lifetime Warranty High output Rapid Charging adapter fits cigarette lighters in both foreign and domestic vehicles