millso headset splitter for 2 trrs headphones or mics - 3.5mm jack adapter trrs 4-pole splitter male to 2 dual female adapter compatible for 2 headphones or microphones to connect mobile phone, laptop millso millso headphone/microphone splitter is featuring one 3.5mm male (trrs) and two 3.5mm (trrs) female connectors, which provide broad compatibility. 1. this 3.5 mm 4-pole splitter cable is not only used to share favorite songs or movies with friends but also for simultaneous voice chat. 2. for simultaneous connection of two headphones or an earphone with a microphone (when using trs microphone, you need a 3,5 mm trs source (female) to trrs output (male) jack adapter), or two mobile speakers to an audio source. (notice: not suitable for gaming headphones with separate headphone and microphone plug.