For sale: Starlane Athalon GPS R lap timer. No beacon needed, this thing runs off GPS. I used it for probably a dozen track days but was WAY more of a toy than I ever needed for what I did! (My wife bought it for me as a gift) They run about $800 new and I've sold all my bikes after having kids so my loss your gain! Let me know of you have any questions. The only thing not here is the bottom piece of Velcro I had attaching this to the tank, otherwise it is in like new condition!