Motorola Wireless Active Headphone Kit for Apple iPod and Cell Phones (MOTOROKR S9 Bluetooth Active Headphones + Motorola D650 Bluetooth Adapter for iPod + Motorola Premium Armband)Great new use of technology. Initial use was easy and sync has never failed. Great not to untangle those darned earbud chords. Great sound and good range from transmitter. Battery life is the only drawback and 4-5 hours seems to be the limit.