Item No. : KT-SP150 Product name: USB Speaker Product features: USB speaker for PC/mp3/mp4/Ipod and other players Plug and play USB connection Low power consumption design Specifications: Rated impedance: 4 ? Output power: 2W*21KHZ, THD10% Supply voltage: 5V Circuit current: ≤800mA Frequency response: 200HZ-12KHZ Supply voltage rejection: ≥48dB Accessories: Audio line with USB plug A power line with USB plug Operation manual