Computer Speakers for Desktop PC, Laptop, Mac, USB Powered, Small Wired 2.0 Channels Dual Stereo Clear with Bass Less Distortion Description USB powerd speakers, compatiable with all computers which with a USB port and a earphone Jack Output RMS 3W*2(6W), stereo sound big and clean with some bass, good for work, music, movies, games, etc Compact design, save your desktop space a lot Plug and play, easy , volume adjustable both by the speaker controller or the computer Features: The M4 speakers are powered by USB port, mini size, decent looking. They save your desktop space a lot, while the sound they produced loud enough for normal size room/office/classroom/dorm/small hall. Specs: Power Input: DC 5V, 500mA~2000mA (USB port 2.0/3.0, power bank, normal cellphone charger) Power Output:3W*2 Connection Mode: USB2.0/3.0+3.5mm AUX(wired) Notifications: They are without a earphone jack, they need a earphone jack on the audio source device( computer,laptop,etc) to work with. These are USB powered with small output, sound volume can't compare with those expensive AC powered speakers with big output. If the on wire controller is inconvenient for you to adjust the volume, pls try to adjust on the computer or the media player. The sound will be small when play some low quality YouTube videos, pls shift to higher quality audios/videos to get better sound experiences. PLEASE PLUG IN THE USB AND THE AUX BOTH FULLY, OTHERWISE THERE WILL BE NOISES OR LOW VOLUME. IN MANY CASES, NOISES OCCUR FROM BAD CONTACTING OF DEFECTIVE COMPUTER USB PORT OR AUX PORT. PLEASE MAKE SURE YOUR COMPUTER USB PORT AND AUX SLOT BOTH FUNCTION WELL, OTHERWISE THERE WILL BE NOISES. THE CAUSE OF STOP WORKING MIGHT BE THE DEFECTIVENESS OF THE SPEAKERS, OR THE DEFECTIVENESS OF THE COMPUTER USB/AUX PORT AS WELL. Amplifer IC Amplifier IC is most important for the sound quality of small speakers. Cheap IC hardly can produce a clean and loud sound. M4 adopted with IC PAM8403, of which the cost is very high for cheap small speakers, but can produce a clear louder sound with less distortion. Driver Unit Drivers play a essential role for speakers. Drivers too small or too thin are difficult to produce a strong sound. M4 adopted high quality 2 inches full range drivers with additional magnets, to make sure the sound strong enough, or at least march their dimensions. Carefully Selected M4 speakers are selected from many other models. Limited production costs and limited power supply( DC5V 2A) limited the sound fidelity and output of M1/M3/M5. We select less but worthy models. Cords Length Reviews which complaining cords too short are common. M4 speaker to speaker cords about 39 inches, AUX cord and USB power cord (from volume controller to plug ) about 43 inches, which may work well with most laptops or big size monitors. More Details You May Concern Metal Mesh Many costomers had experiences that the drivers got damaged or ripped off when there were no protection for them. Each of the M4 driver is fixed by 4 screws,and protected by a metal mesh. No matter how cheap an item is, duration is important. Surface Dealing Many small speakers are with flat original plastic colors, to save the cost. M4 surface is with fine rubber oil painting, just for a decent looking and better touch feeling. Passive Woofer Since small 2.0 speakers without a main woofer box, many of them can't performance the audio bass part well. M4 with passive membranes at back side, they won't creat a super bass but at least could enhance some, better than without. The beats hit on a dram sound better than hit on a desk. Volume Controller M4 are with a handy independent volume controller, very easy to adjust the volume when enjoying the music or movies. With a stardand 3.5mm AUX plug and USB2.0 plug, easy to hook up, plug and play. Shipping We only ship items to your registered address for fast and accurate shipment. Thanks We will ship most orders within 1 business day some items ship same day if ordered early enough Delivery All shipments are shipped via USPS First Class (2-6 business day) from United States. Return Policy All items qualify for returns within 30 days of receipt. Feedback 1.We strive for 5 star positive feedback. We try our best to offer the best service for our buyers. 2.Please message us via before leaving negative feedback.Let's solve the problems together! 3.Please give us a chance to resolve any issues before posting a feedback. 4.Please contact us with any questions or concerns. Thank you for your watch. We look forward to serving you.