Vintage 1973 TDC III 3-Way Fish Call by Product Promotions Inc. is a unique electronic solid-state transistorized fishing aid. This multi-functional tool serves as a temperature indicator system to locate specific thermal strata, a depth locator gauge, and a call attractor system that utilizes sound waves, light waves, and attractor pellets to draw fish. The unit features a classic orange plastic housing with woodgrain-style accents and comes in its original styrofoam packaging and box. Ideal for collectors of vintage fishing gear or those looking for a retro addition to their tackle box. Requires two 1.5 Volt "C" batteries and one 9 Volt transistor battery (not included).