General description: This roof-mounted signal amplifier is designed to improve your signal strength and radio reception in areas with poor coverage. It uses a copper signal cable to provide strong anti-interference, increasing the reception distance and improving the sensitivity to weak signals. By effectively reducing noise, this amplifier allows you to better receive the radio signal. Technical specifications • Gain: 25 dB • Noise factor: > 2 • Impedance: 75 Ω • Voltage: 12 V • Current: 18 mA • Frequency: 80-108 MHz • Cable length: Approx. 33 cm / 13 \" • Housing dimensions: Approx. 55 x 35 x 15 mm / 2.17 \" x 1.38 \" x 0.59 \" • Package weight: Approx. 53 g Compatibility and accessories • Included: 1 x Antenna radio amplifier • 1 x Adhesive • 1 x Red clip Installation Easy to install, this amplifier saves cost and space. Make sure the round interface is compatible with your car's connector. Usage Connect the amplifier to a 12 V power source to improve your radio reception. It is particularly effective in areas with weak signals. Other information • Please allow 1-3 cm error due to manual measurement. • The colors shown may differ slightly from the actual item due to monitor calibrations. • New and old types of this product will be sent randomly.