Features: 1) Supports 12 numbers 2) Manage, setup, unlock card\'\'s password (PIN) 3) Built-in ring editor 4) Works with all GSM phones, no brand restrictions 5) Rewritable to any number of different communication operators with the original card 6) Large phone book capacity with 250 numbers and 40 SMS 7) Shift to another number when the phone is on, no need to re-power on 8) All backup information in compliance with security standards of the US defense department 9) USB interface, high speed Inner packing: Carton dimensions: 46 x 30.5 x 28.5mm Outer packing: Color box 50 sets/carton