Analogue audio adapters allow for a simple connection of an audio output such as speakers, headphones or headset to an audio input. The Lindy 2.5 mm to 3.5 mm audio adapter is a compact solution that allows for the connection of a variety of 3.5 mm headphones and speakers to some standard or TTY phones. The small, flexible adapter ensures the connection remains flexible and adaptable for the user. The TRS 2.5 mm connection allows for balanced mono input or output audio or unbalanced stereo audio output with connection of headphones.