TOPO GREAT BRITAIN PRO 1:25K OS MAPS FOR Garmin GPSMap62s handheld GPS unit. I have used this faultlessly for about a year in my Garmin GPSmap 62s I cannot guarantee compatibility with any other unit although apparently it is compatible with the 64s also. The main proviso in the information sent to me when I bought this card is always remove the card from the GPS unit if connecting to GarminExpress otherwise the card will stop working. Any questions please ask. I will post for free
