... 7V. 15.5Wh, Rechargeable lithium polymerCharging30pin InterfaceInput and outputSystem Interface30pin(USB connection,HDMI, Charge)Headphone jack3.5mm stereo compatible 3.5 ... ,volume+/-,OFN(5 direction), home, menu, back, multitasking ,ResetAccessoriesexpansion slot , USB cable, HDMI cable, charger, Earphones(the separated MIC)Applications software ... ,E-mail Onyx Boox TF7C 7" Tablet PC with 3G phone call