Please note: The microphone jack only supports TRS (3-pin), but not TS (2-pin) and TRRS (4-pin). 3.5mm Jack to 3.5mm Jack Adapter --- CTIA Standard Note: It is compatible with CTIA helmets. If the jack of your 3.5mm device is OMTP compliant, the microphone function will not work. It does not support desktop PCs and laptops with two holes. Only the TRS jack microphone can work with this splitter. Audio adapter cable 3.5mm: Turn a 3.5mm headphone/microphone jack into two separate ports, i.e. a 3.5mm headphone jack and a 3.5mm microphone jack. Ideal for connecting headphones and external microphones to smartphone or computer. Product features: Input: 3.5mm 4 pin plug for headphones or headphones. Output 1: 3.5mm jack to 3 points (TRS) for headphone jack on your PC/laptop. Output 2: 3.5mm Female to 4 Points (TRRS) for Mic Jack on your PC/Laptop. Suitable for headphones with separate 3.5mm jack sockets for microphone and headphones. Support standard CTIA devices, you can use it without worry. Compatible with PC Skype, MSN Messenger, Google Voice, give you more joy during use. Wide audio application: Compatible with iPod, iPad, tablets, laptops, laptops, new computers, PS4, mobile phone, gaming headset. Compatible with smartphones (Apple and Android), Sony, Samsung, HTC, Motorola, Nexus, Nokia, LG, Blackberry and many more.