Features: Works with any device that has a 3.5mm plug including smartphones, tablets, mp3 player, speakers; Suitable for your car system, home stereo; Ground loopFilter noise isolator, eliminating the hiss, buzz and interference caused by groundLoop; Ultra compact size, exquisite workmanship and delicate quality, elegant shape, easy to be carried anywhere for multiple use. Filters out noise instantly for clear, uninterrupted, uncompromised sound; Specifications: Material:ABS Color:Black Size:Approx.60x22mm/2.36x0.87in 3.5mm Port Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Ground LoopNoise Isolator