Vktech&reg; Unlocked Phone Dual SIM Cards Support + GSM 850/900/1800 / 1900MHz + 5000mAh Battery + Camera + Waterproof + flashlight + FM + Bluetooth V2.0 (Black) Support Dual SIM + GSM 850/900/1800 / 1900MHz + Camera + 5000mAh Battery + waterproof + flashlight + FM + Bluetooth V2.0 External battery! You can remove the battery to charge your another phone When it can not load, you can disconnect the battery and charge via USB Cable Unlocked Waterproof Dustproof Shockproof , RAM: 32MB, ROM: 32MB; Support TF card up to 8GB SIM Card Configuration: Dual sim cards, dual standby