This product is FM/MP3 Transmitter with full frequency. It transmits output signals of various equipments (e.g. portable CD, DVCD, MD, MP3, repeater, voice pen, palm and PDAs) with frequency modulation. These signals are received and played by automobile audio equipment. You can enjoy high-quality audio conveniently and economically. Adopted 3D sound decoding technology, it can reproduce high-quality audio signals from MP3, MD, CD and TV HI-FI equipments. It also introduces Phase Lock Loop (PLL) technology to ensure the stability of FM signal emission without any excessive frequency shift. Auto research is available, and hundreds of frequencies for your choice, avoiding the conflict with your local broadcasting stations. Technical Parameters Valid Range: >15m Operating Current: 38mA Operating Voltage: car power: 5V Battery: 2-3V Channel Isolation: ≧65db Frequency response: 20HZ?0KHZ Output Frequency: from 87.7MHZ to 108.0MHZ Wire: 80cm Packing: Double Plastic Blister Dimension: 76cm*44cm*25cm Net Weight: 55g (body + audio wire, exclusive of battery) Accessory: Size of Carton:50cm*39cm*20cm Gross Weight of Each Carton (50pcs): 6.5kg QTY: 50pcs/Carton Features: 1. Full frequency from 87.7MHZ to 108MHZ, more than 200 frequencies for you choice to avoid interruption. 2. LCD display with blue light background, easy-modulation. 3. Qualified voice let you enjoy as wonderful music as the CD player plays. 4. PLL technology automatically searches available station. 5. Temperature device displays the environmental temperature. 6. Three memory keys make you easily choose your favorite stations. 7. Frequency memory automatically plays at the frequency you last play as soon as you plug the transmitter. 8. Display the time. 9. Three power source modes: car power, dry battery and rechargeable battery. 10. Indication of low voltage, power quantity and charging status. 11. Designed with 2.5mm and 3.5mm portals for various MP3 players. 12. An advanced charger with USB and DC portal are applied to charge mobile, digital camera, IPOD and other digital products with 1A current, faster than those common chargers with about 50mA current. 13. Equipped with a charge set, including several charging portals and a special USB wire, can charger various types of mobile by connecting with computer at home or in an office. 14. A trough design identifies itself with the utility of charging 7 mark hydrogen-nickel or cadmium-nickel battery.