The CM2038 is a dual audio power amplifier. supply voltage of 6V, 3.5W of output power (5W ) can be supplied to a 4 load with a guaranteed of less than 10%, or 2.2W of output power to an 8 load.PM2038 circuit features external control, low-power shutdown mode and internal thermal protection, and reduce the "power-on surge pulse" in the circuit.Product Name: CM / PM / SJ2038 two-channel amplifier boardOperating voltage range: DC2-6V (recommended voltage: DC5V)Max output power: 5W + 5W (typical is 3.5W)Type:Power Amplifier Boardsize:50x45mm Material:PCBcolour:GreenPackage Contents:1 x Amplifier BoardOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Please allow slight errors due to manual measurement. Please make sure you don't mind before bidding. Color may vary depending on your monitor, please understand. Note: Hello, please pay attention to your shipping address when purchasing products. If your delivery information (e.g. name, street, house number, doorbell/email without name, etc.) is incorrect, the order will not be delivered correctly