It's a Regency, or SBE binary programable scanner. It was called an "edge" or "optiscan" It used cards that you punched a hole, or pencil in to set the frequencies. You could make different cards to scan different areas. Regency also had one called a Whammo 10, that used plastic combs, that you broke off teeth to program frequencies in. Bearcat had the model 101, that had 16 switches, that you would put up or down to program in frequencies, based on a book of frequencies. If you had a frequency that was not in the book, you had to use an equation to figure out which switches to switch up, or down.