Compared with other similar products, our car power amplifier board adopts an advanced Bluetooth-compatible chip to achieve lossless transmission. And more, you can also adjust the volume and bass, and enjoy different sound quality. Our car power amplifier board supports TF card, so you can download your favorite music in TF card, and enjoy your favorite music at any time. In addition, this product is compatible with mobile phones, computers, tablets and various Bluetooth-compatible devices. After the current passes through the power amplifier IC, 90 percent-95 percent is converted into a sound signal, and 5 percent-10 percent is converted into heat loss, and the sound is clear and comfortable. Stable quality, power saving, low energy consumption, low heat generation and long service life. The length of this product is 13.8cm, the width is 8.4cm and the height is 6.3cm. It also has the function of radio. This product also can connect with wired microphone. Mono output, it can also use tweeter. This product is perfectly suitable for car, auto, SUV, vehicle and so on. Item Name: Amplifier Board Material: Metal Rated Power: 35W Working Voltage: 9-28.7V Sound Conversion Rate: 90 Percent Input Voltage: 12V/24V/220V Sensitivity: 200hv Features: Universal, Easy Operation, Stable Size Details: L: 13.8cm/5.43", W: 8.4cm/3.31", H: 6.3cm/2.48" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Amplifier Board 1 x DC Power Cord 1 x Subwoofer Cable 1 x Remote Control 1 x Power Cord