Connect a 2.5mm audio port to the 3.5mm connector of an audio source device. The TRS connector (tip, ring, sleeve) allows for the signaling of balanced mono or unbalanced stereo audio or the connection of a microphone. The Lindy 2.5mm to 3.5mm audio adapter provides a compact solution for connecting devices with a 2.5mm audio connector (such as many headphones or speakers) to source devices with a 3.5mm audio connector (e.g. smartphones, tablets, and laptops) ready.