Features: brand new and high quality Built-in 500mAh polymer battery, long service for time up to about 8h. EQ audio switching, one-key mute, built-in microphone function, can realize four kinds of one-key sound switching. One-click listening mode, dedicated to FPS games, amplifying the sound source, listening to the sound and position of distinction, one step ahead. Physical volume plus and minus buttons for easier control, dedicated audio chip, clear sound without distortion, enjoy more realistic sound quality. Suitable for controller handle with headphone jack, easy to install, plug and for play. Specifications: Material:Plastic Size:Approx.5.3x3.8x5.1cm/2.09x1.5x2inches Color:Red for Package Includes: 1x Sound Enhancer note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.