The Braun T3, also known as the "Pocket Radio" or "Transistor 3," was a portable radio designed by Dieter Rams for Braun in 1958. It was one of the first portable radios to use transistor technology, which allowed it to be much smaller and more efficient than earlier tube-based radios. The T3 was designed with simplicity and functionality in mind. Its compact size made it easy to carry around, and its minimalistic design made it easy to use. The T3 was also notable for its use of materials. The case was made of plastic, which was durable and lightweight. The design was sleek and modern, with clean lines and a minimalist aesthetic that was typical of Dieter Rams' designs. The T3 was a commercial success and became one of Braun's most iconic products. It was praised for its innovative design and portability, and it influenced many later designs of portable radios and other portable electronic devices.