Product Information Multimedia Speaker System Computer PC Desktop Laptop Speakers 2.1 Bass Subwoofer Color:Black Shocking Bass (Main Speaker), Treble Clear Bright (Satellite Speaker) Technical Parameters Frequency Response: 40Hz-18KHz Signal-to-Noise Ratio: 60dB Which devices are we able to connect X7 speakers? It must meet to 2 conditions: 1, its audio interface must make stronger 3.5mm jack; 2, you’ll offer USB power supply interface. Please find installation diagram on pictures area. a: main speaker, b: satellite speaker, c1: audio output port of a, c2: audio input (3.5mm jack) plug of b, d: audio input (3.5mm jack) plug of a, e: USB 2.0 power cable plug of a. How to connect my computer? Insert c1 into c2, insert d into output port of your computer, insert e into USB 2.0 port of the computers black. How to connect my iphone 6 plus/S7? (can not connect iphone 7) Insert c1 into c2, insert d into output port of your phone, insert e into USB 2.0 port of original (phone) adapter. How to connect my PC/computer? Insert c1 into c2, insert d into output port of your PC, insert e into USB 2.0 port of original (phone) adapter. Why is the sound very small? (5 common cases) 1, No turn up the volume of speaker; 2, No turn up the volume of computer; 3, No turn up the volume of player; 4, Not insert USB plug of speaker into the back USB port of computer, or insert USB plug of speaker into phone adapter, if it is not original adapter, which can not meet the requirement; 5, If play music from your phone, not loud on some ones. Features and Specification Features: 2.1 Computer Speakers: USB powered for portability. Subwoofer: (Main Speaker) 4.1*3.9*6.1 inches. Treble: (Satellite Speakers) 2.6*2.6*3.9 inches (each) Total RMS Power: 9W (5W+2Wx2) Volume keep an eye on with On/Standby Power Supply: DC 5V USB,LED power indicator Ships in Certified Frustration-Free Packaging Shipping / Return Policies (Balanced) Shipping Policies: We ship to the Lower 48 States only (Does NOT include Hawaii or Alaska) We cannot ship to PO Boxes/APO’s We cannot combine shipping. No Local Pickup. All items will be shipped directly to you from our supplier within 1-3 business days. Most items are delivered within 3-5 business days, Then again, please allow 3-10 business days. All items are in stock when they are listed. Inventory is tracked and updated continuously. Then again, if demand exceeds our supply, We can give the customer the following options: Full refund. Have the item back ordered and shipped when it becomes available. We can offer other items in similar style and quality. Your bid / purchase of the item implies you agree to this policy. If you have a question about a product not differently answered in the item description, please contact us via eBay messages first and allow us the opportunity to help you and be sure we have what you’re searching for. Exchange/Return Policy: Your satisfaction is guaranteed! If for any reason you are unhappy with your item, just return it within 14 days for a full refund, minus shipping cost. Please contact us prior to initiating a return so that we will be able to issue you a refund authorization. Payment Policy We require Immediate Payment. Must be an authorized address.