Pico Electronics Audio Transformers provide galvanic isolation, signal gain/loss, match impedances between two interfaces, can be used as a reference and to provide feedback signal. These ultra-miniature sizes were designed for compact applications, while maintaining environmental durability for their electrical characteristics. These transformers meet thermal shock cycles from -55°C to +130°C with capability up to 300 thermal cycles. Our proprietary materials and methods allow extreme temperatures without degrading the reliability of their form and function.