Computer Speakers With special particular patent in worldwide - expansile resonator construction design . Dimension: 52.5 x 35.5mm/52.5x 70.mm Net weight: 100g Speaker: 36mm x 2 Input: L/R280mV Power output: 1.7W x 2 S/N: 80dB AMP frequency range: 280Hz - 16kHz Charge voltage: 5V+0.5V Suitable temperature: 0 - 40°C Applicable for MP3, MP4, laptop, PC, MD, mobile phone, and more, all kinds of ...