The Quattro 4.0 is the only neckloop with a removable Bluetooth microphone. This gives you the ability to hear clearly in environments such as in meetings, in restaurants, in your car, etc. This is in addition to connecting to any Bluetooth cell phone, or other Bluetooth device such as your computer or tablet.
The Comfort Contego personal digital FM system transmits high-quality, crystal-clear sound on secure channels to protect you from electronic eavesdropping. The receiver doubles as both a personal amplifier and an FM receiver at the same time. It has a range of about 100 feet.