has any body seen or used one of these before?
http://cgi.ebay.co.uk/MULTI-FUNCTION-BICYCLE-ODOMETER-SPEEDOMETER-BIKE-KM_W0QQitemZ7209624463QQcategoryZ30108QQrdZ1QQcmdZViewItem

See feedback, this may or may not be important to you?

"*LIED about item Location. NOT LONDON but from HONG KONG*"