Wax Bee is rechargeable and compatible with all Bluetooth enabled music and hands-free devices, and supports voice dial and redial functions.

ENGADGET: BeeWi's Ghost Bee Bluetooth headphones also stream music to your stereo (hands-on)

It also can be a rather multi-step affair to even make a call, since there's no home screen speed dial or voice recognition, and the phonebook can't be searched, only scrolled through.

ENGADGET: Apple iPhone review roundup Mobile

One of their current projects is the SmartButton, a wireless Bluetooth-enabled badge that connects to your phone and that you press when you want to call someone (you use the phone's voice recognition software to actually dial).

ENGADGET: Motorola's Bluetooth SmartButton