The Tenealay 3.5 Mm Audio Volume Controller, Line Volume Control Box, And 1/8" Description: This MC11 box is a mini size line volume controller, you can adjust volume quickly without using the music player any more. Product design is pure volume level control, it is not affects sound quality or color added. (note it has no amplification function) Very conveniently to control volume to get a comfortable listening level. Features: Compatible with many devices and music system: headphones/headsets, MP3 player, smartphone, PC computer, TV, amplifier,active speaker etc which have line out jacks Quality potentiometer and other components. Build in quality aluminium CNC chassis, looks nice and durable. With rubber feet on bottom. Connectors: 1 x 3.5mm (1/8") input 1 x 3.5mm (1/8") output Use instruction: No need power supply. Plug and play. Product Features Useful and Quickly to adjust volume level Up and Down 3.5mm 1/8" aux input output jacks It allow you to adjust and control the volume level directly Build in solid aluminium CNC chassis, looks nice and durable. No need power supply. Plug and play. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!