Weightless? Not really. This 2.4Ghz headset phone still weighs about 40g. Hammacher Schlemmer still calls this cordless phone the Weightless Headset Phone.
This headset has an integrated keypad for dialing and looks kinda futuristic. It works like any other cordless 2.4Ghz phone. The headset supports 40 channels and 100' reach.
Hammacher sells Weightless Headset Phone for $99.95 and like with all Hammacher Gadgets it comes with a lifetime warranty.