Description <br> 1: Using LM1036 tone chip , <br> 2: Board with volume - balance - treble - bass. <br> 3: With a rectifier circuit, AC and DC, DC input do not divide positive and negative. <br> 4: The power supply filter uses a 3300uf / 25V + 2200uf capacitor . <br> Operating voltage: DC 12-24V <br> AC 9-16v <br> Types:A: Potentiometer fixed version/B: Potentiometer Separated version <br> Colour:Photo Color <br> Material:ABS <br> Size:10 x 3.3cm <br> <br> Package Contents: <br> 1 x LM1036 tone board <br> Only the above package content, other products are not included. <br> Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. <br>