... Power supply, USB , TF slot, Factory HK-311BT Bluetooth wireless keybaord for Ipad2 with Hi-Fi Stereo Speaker Main ... Function1.) 2.1 Hi-Fi Stereo Bluetooth Speaker;2.) Bluetooth keyboard;Specifications: Bluetooth version 3.0System RequireWindows OS, MacFeatures:1.) ... Tablet PC, Smart mobile phone, output voltage:5V3.) With bluetooth keyboard;4.) Play audio files directly from USB flash drive ...