FMtalk connects your music phone to your car stereo easily over FM radio waves, let you enjoy the high quality music of your phone and hands-free talk via car stereo, offers you more safety during driving. Specifications: Frequency response: 100Hz-15000Hz. Operating current: 20+-3mA. Input voltage: DC 12V. Sensitivity of microphone: -25+-3dB. Frequency range options: EU: 87.6-107.9MHz (interval 0.1MHz). US: 88.1-107.9MHz (interval 0.2MHz). JP: 76.0-90.0MHz (interval 0.1MHz). Dimensions: W60 x H30 x D12.6 (mm). N.W.: 14g. Car Adapter is included - DC2.5mm, input 12V, output 3V 50mA, 32g.