Features: 1) Backup and copy phonebook directly off SIM card 2) Volume: 64kB (250 telephone directory records) 3) Independent operation: does not require any connection to other device to operate 4) Copy information from our device to any SIM card, anywhere 5) Data retained even if power is lost Outer packing: 400pcs/ctn Carton dimensions: 65 x 46 x 32cm