Check the listing for details. 3 PCS 4P3T Rotary Switch 4 Pole 3 Position Band Selector 1 Deck. Condition: New. Listed at 16.39 USD. What is this?This product is a band switch, also known as a multi-pole multi-throw switch. It features multiple levels and positions, with various contact pieces fixed on an insulating substrate.What will I get?Contact Type: 4 Pole 3 Position;Number of Deck: 1 Deck;Total Dia: 31mm / 1.22 Inch;Thread Dia: 9.8mm / 0.38 Inch;Shaft Dia: 5.8mm / 0.22 Inch;Shaft Length: 13mm / 0.51 Inch;In the package of: Rotary Switch x 3 Pcs, A03 Rotary Knob x 3 Pcs, gasket x 3 Pcs, nut x 3 Pcs;;Are there any advantages of the product?The band channel rotary switch selector is widely used in applications such as radio, TV industrial machine control units, and other electronic devices. It offers versatility and flexibility for managing multiple inputs and outputs.How to use it?Connect the appropriate wires or circuits to the specified pins on the switch.