Verizon Plantronics Bluetooth SpeakerPhone FM Transmitter For Audio Car Speakers The Verizon Plantronics Bluetooth SpeakerPhone FM Transmitter is a portable device that allows for hands-free calls and audio streaming to your car speakers. With its Bluetooth wireless technology, you can easily connect to your Verizon device and enjoy high-quality audio transmission. The FM band also ensures reliable signal strength, making it a convenient and versatile accessory for on-the-go use.