Mounts on vehicles' sun visor with strong magnetic clip no installation Caller's number appears on backlit 14-digit LCD display with incoming callsDigital Signal Processor (DSP) for noise suppression and echo cancellation Full duplex; speak and listen simultaneously 1-touch hotline button calls designated numberUp to 8 hours talk time and 200 hours standbyCompliant with Bluetooth v2.0 devices up to 33'Includes magnetic visor clip and DC adapter