The Motorola TX500 Essential Series In-Car Speakerphone is a mobile speakerphone so smart, you could go months without charging. Experience the most talk and standby time available with noise reduction--the smarter way to stay connected on the road. The Motorola TX500 utilizes version 2.1 Bluetooth wireless technology, allowing for a speedy connection to compatible Bluetooth enabled devices, improved audio, fewer dropped calls, and reduced interference from other wireless devices.