... system mini speaker Perfect Bass Bluetooth Mini Wireless Speaker For Iphone/ipad/laptop Main faetureOriginal green technology, art and creativity ... quality & powerful bassGreat for work, school, beach, travel and more! Specifications: usb speaker,portable usb speaker,mini speaker,portable ... Horn Specifications: 2" 4Ω 3W 8) Power supply: USB charge or Build-in Lithium battery 9) Lithium battery capacity ...