Mini Speaker with 3.5mm Jack and USB Powered for PC and Laptop – 02L Mini Speaker 3.5mm 02L Output: 5W Frequency: 90Hz~20KHz Power: USB / DC 5V=600mA Impedence: 4Ω Channel: 2.0 Separation: >=40dB Sensitivity: >=80dB ± 2db SNR: >=80dB ± 2db Material: Plastic MP3 Format: MP3 / WAV More speakers Feature: – Compact design, easy to place, optimal configuration for laptops. – 3.5mm audio input interface for linking computer / MP4 audio to speakers for playback. – 5W 4Ω full range speaker, the sound is more round and bright. – Rear switch to adjust the volume, convenient and fast. – Direct power supply via USB, convenient and practical to improve product reliability. One pair of speakers, the laptop USB speakers deliver clear rich and strong stereo sound for your computer. -The small size allows the pc speakers to easily sit on your desk. – USB Powered and 3.5mm Audio Input,Just plug the USB cable into your device or the wall and plug the 3.5mm jack into your audio device and not need drives. – Compatible with laptops,desktop,notebooks, pc, smart phones, tablets, MP3, MP4 and more devices. works with Windows and Mac OS.