Designer can go to http://www.bluetooth.com/ to take a look at Bluetooth logo which is owned by Bluetooth special interest group.
My requirements is the logo
1. Should be simple, easy to remember upon first time seeing it, it'd better have a circle inside the logo, similar like the logo of Honda, Toyota, Benz Mercedes, BMW, etc.
2. Shold try to combine Bluetooth logo with some slight change.
3. had better Indicate environment friendly and low energy.
4. should have different colors like Google, Ebay, Olympics logo.