The CM2038 is a dual BTL audio power amplifier. supply voltage of 6V, 3.5W of output power (5W ) can be supplied to a 4Ω load with a guaranteed of less than 10%, or 2.2W of output power to an 8Ω 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 board Operating voltage range: DC2-6V (recommended voltage: DC5V) Max output power: 5W + 5W (typical is 3.5W) Type:Power Amplifier Board size:50x45mm Material:PCB colour:Green Package Contents: 1 x Amplifier Board Only the above package content, other products are not included. Note: Light 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. Operating voltage range: DC2-6V (recommended voltage: DC5V) Max output power: 5W + 5W (typical is 3.5W) 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 board The CM2038 is a dual BTL audio power amplifier. supply voltage of 6V, 3.5W of output power (5W ) can be supplied to a 4Ω load with a guaranteed of less than 10%, or 2.2W of output power to an 8Ω load.