Feature: 1. This car radio antenna has a wide frequency reception range, which promises clear video playing on car. 2. Equipped with built-in RF amplifier, the car radio extension cable can enhance the signal and reduce noise. 3. With the LED indicator, you can intuitively understand whether the antenna is powered, and reduce misjudgments. 4. Add silk screen for more direct understanding about what signal the product receives. 5. Use color cards and explain the relevant parameters, so the size can be as small as possible and the transportation cost can be reduced. Specification: Item Type: Car Radio DAB Antenna Impedance: 50/75 ohms. Receiving Frequency Range: band Ⅲ: 170 ~ 240 mhz; band I: 1452 ~ 1492 mhz; Power Supply Voltage: DC5V Working Current: 20ma~ 30ma Operation Guarantee Temperature Range: -20℃~ + 60℃ Storage Guarantee Temperature Range: -40℃~ + 85℃ V.S.W.R. <2 Reception: 15 dB±3 db (Band Ⅲ), 18 db±3 db (I band) Cable Specification: RG174 with power cord Connector: SMB Application: Used for digital radio DAB wireless receiving module, built-in radio frequency amplifier. . Package List: 1 x Car Radio DAB Antenna Note: Since the product is built‑in power supply, after the user turns on the device, please confirm whether the indicator light is on. If it is not on, it means that the device is not powered and the amplifier cannot work normally.