Honeywell Bluetooth Airlite 900 Portable Hands Free Car Kit Ultra-slim design, matching the size of a standard credit card and weighing only an ounce Privacy feature instantly switches over to hand-held mode without switching back to the cell phone Full duplex and Digital Signal Processing (DSP) for clearer conversations and background noise cancellation Leather holster with built-in clip conveniently secures to seatbelt or visor Compliant with Bluetooth v2.0 devices up to 33'