More on Amazon.com : http://www.amazon.com/gp/product/B000F000IC?tag=thefatkidin06-20

Plantronics CS351N Supra Plus Wireless Headset

Interference-free calls up to 300 feet away from desk phone
Noise-canceling microphone reduces background noise
64-bit digital encryption provides call privacy
Single earpiece style lets you hear the conversation and whats going on around
Ten hours talk time without recharge