Wireless New Generation FM Transmitter desinged for Sandisk Clip Jam with Powerful Compact Car Charger Included Full FM frequency spectrum is available and is user selectable in 0.1MHz increments from 88.1 to 107.9 MHz. Advanced Digital PLL sound coding maintains stable and high quality sound. Specification: Input Voltage (12-24 vDC), Cable length (50 inches), Transmitter Dimensions (2.25 X 1.25 X .25 inches), Circuit Design (Sandisk Clip Jam Specific) Car charger includes smart technology circuit architecture to provide precision voltage and resistor regulation specific to the Sandisk Clip Jam. Protects the internal battery longevity by modulating the charge in a safe and efficient manner. A best-selling product from Gomadic Corp, one of the leaders in consumer electronic accessories. Product is designed to last and is backed by our Gomadic Lifetime Warranty. Buy with confidence!