Description: The current mainstream mobile phone headset plugs are mostly 3.5mm, 4 segment plugs. Although the plug size specifications of all brands are the same, different national standards (OPTM and CTIA2) are not compatible with each other. This adapter is to convert these two different formats, and make your earphone compatible with mobilephone of these two standards. Specifications: Connector: 3.5mm Male to Female Diameter: 8mm / 0.3in Height: 45mm / 1.8in Quantity: 3PCS (Optional) Weight: Approx. 11-17g Package List: 3 or 5 * OMTP to CTIA Converter

Compatible with most smartphones & tablets with 3.5mm jack in the market. Reduce outside interference and signal loss for good sound quality, respectively. Compact size and light weight, gold plated connector allows better signal connection. It allows you to use your earphone in kinds of devices with 3.5mm jack, avoid the problem of incompatible. This is a bi-directional adapter which converts either OMTP to CTIA or CTIA to OMTP.