Function: USB keyboard ,support storage disk(SD,TF, Flashdisk),support ... memos, control volume and so on.• Connect to computer USB port with supplied cable.• Connect to computer, mobile phone, MP3, ... realize the function of plug & play.The speaker has two speakers (2”, 2.5W, 4 ohm), output power: ... RNS 4W (2W + 2W).Power input: USB power supply (if you use other power supplies, it should ...