Features: 1) Product size: 81 x 50 x 13mm 2) Backs-up and restores phonebook data from SIM card 3) Memory: 16KB - 500 phone records (or 2 different SIM cards data storage) 4) Password lock and phonebook viewing 5) Data can be added up from one SIM card to another SIM card 6) User-friendly operation interface supported 7) Supports data exchange amongst different SIM cards 8) Device independent, no PC or PDA required