UPS For Router

2 pcs Stereo Speaker for PC
USB2,0 powered, 3,5mm plug,
– Output Power: 3W x2
– Speaker: 50mm, 4Ω
– USB cable length: 150mm
– Ferquency response: 100HZ-18KHZ
– Power supply voltage: USB 5V/1A
– Signal to noise ratio: >80db