... Power supply, USB , TF slot, Factory HK-311BT Bluetooth wireless keybaord for Ipad2 with Hi-Fi Stereo Speaker Main Function1.) 2.1 ... PC,Smart Mobile phone2.) Power supply as a power bank for Ipad,IPhone, Tablet PC, Smart mobile phone, output voltage:5V3 ... Demension:240x225x130MM Product Net Weight:100g Factory HK-311BT Bluetooth wireless keybaord for Ipad2 with Hi-Fi Stereo Speaker