Product Name: 2 SIM Phonebook SaverModel Number: KB03Place of Origin: ChinaFeatures: 1) Backup and copy 2 SIM card(A&B) phonebook directly of SIM card. 2) Volume: 2 x 64KB (2 x 250=500 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