This listing is for a friends Sat Nav (Binatone b350), this nav comes with charger and window mounted suction! l have tried to work it, it picks up the required satellites but for some reason does not click onto the navigation page... l can only assume that a SD card is required for this application to work? l really dont have a clue! its in very good condition and will be well packaged to the buyer! please any queries dont hesitate to contact us and we will help where and when possible... also any help on the clarity on the SD card would be appreciated. thank you...