Specifications: 1) Dual SIM card for almost all GSM mobile phones 2) Avoids charge for roaming and long- distance calls 3) Message receipt available when power off 4) Ultra slim design with soft, double IC import FPC board 5) Dual SIM card selects one card to work automatically on power on, reset the phone to access the other 6) Set call divert on mobile to use both cards synchronously on one mobile phone Inner packing: Dimensions: 2.5 x 1.5 x 0.09cm N.W.: 0.63g Outer packing: Dimensions: 5.9 x 13.3cm G.W.: 7.50g