If you’re looking for a pair of speakers which has acoustic quality stereo sound, small size and not taking too much space on your desk and easy to carry. Sanyun SW102 will absolutely will be your best choice. Specifications: Product Net Weight: 520g (18.34oz) Dimension: W 10 x D 7 x H 7.5cm RMS Power: 5W X 5W Channel: 2.0 Speaker Unit: 40MMx2+Diaphragm X2 Frequency Response: 30Hz – 20KHz S/N Ratio: > 60dB Separation: > 40dB Power Supply: 5V USB Interface: 3.5mm audio interface Here are FAQs Q1: Sound distortion or low volume Maybe it's because the current is too low that the speaker's power is insufficient. Especially when connected directly to computers, the current of USB interface of some computers will be less than 1A. Q2: Continuous noise Because many computers don't deal with power systems in a special way, when both the audio and the power cord are connected, the speaker receives the current signal from the computer and generates noise. Q3: Less or no bass It may be because the speaker is underpowered, or it's because the bass diaphragm is damaged in transportation. The above three problems, we suggest you to try to replace other equipment to power first, such as 5V charger, and make sure the current is greater than 1A. No matter what kind of problems you encounter, please contact us directly and timely. We design and produce this product. We have professional laboratory and technical personnel, and we have a perfect after-sales service system, we will try our best To protect your rights and interests Sanyun, dedicated to create the best speakers, to provide the best sound enjoyment. The best products and the best after-sales service, is our eternal goal.