Introduced in January of 1946, the 2-Way Wrist Radio was an invention of industrialist Diet Smith’s son Brilliant. Like many of Smith’s inventions, it was kept from the public marketplace and given over exclusively to the use of law enforcement. The 2-Way Wrist Radio allowed for audio communication between 2 parties. It was powered by a strong atomic battery, and used an aerial wire that ran up the inside of the wearer’s sleeve. It was considered vastly superior to bulky walkie-talkies or CB radio devices, and was used very effectively by Dick Tracy and the members of his department.