... /1900/2100MHZ)Slot:1*TF card slot1* SIM card slot1* headphone slot2* USB slot1*DC slotVideo:Mpeg-4,H.263,H ... card slot,1*SIM card slot,2*USB slot,1*headphone slot,1*DC slotAc Adapter100-240V InputLithium battery3.7V/4200mAh ... left to right, respectively MINI USB, LED, DC power input, headphone jack, the most right is the speaker. The power button is ...