1. Enhance radio signal and reduce noise
2. Easy to assemble, save cost and space
3. Working frequency: FM 80MHz-108MHz, AM 520KHz-1710KHz
4. Gain: FM 10dB, AM 8dB
5. Impedance: 75 ohms
6. Working current: 10mA- 30mA
7. Working voltage: DC 10.5V - 16V