HTTX 4-Pole 3.5mm Audio Male to Double Female Stereo Headphone Jack Splitter Cable Adapter for External Speaker and Headset (Black) 4-Pin 3.5mm to dual 3-pin 3.5mm Headphone Splitter Adapter. Used to split the audio output to two separate sets of headphones or speakers. Fully supports iPhone, iPad, iPod, Android, speakers and all MP3/MP4 devices Ideal for splitting audio for iPods, iPhones, iPad or any MP3/MP4 Media Players. Lightweight, yet sturdy design that can easily be plugged in when required. Note: it is a splitter, not a combiner. NOT work for microphone What You Get: 1 x 3.5mm Stereo Male to Dual Female Splitter, our worry-free 18-month warranty and friendly customer service.