Specification: Origin: Mainland China Type: Voltage Regulator Condition: New Application: Speaker Supply Voltage: DC 2.5-5.5 V Model Number: Digital Amplifier Board Super miniature digital amplifier board 2 * 3W Class D PAM8403 amplifier board 2.5 ~ 5V can be USB power supply Product parameters: Power supply range: DC2.5-5.5V Output channel: Left and right dual channel 3W*2 Audio input: left and right ground (LRG) three-wire input Product Size: 25*18*2mm Application range:LCD TVs, monitors, laptops, portable speakers, portable DD players, game consoles, cell phones, hands-free phones, etc. Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1Pc *Digital Amplifier Board 1.Compact and Powerful: This super mini digital amplifier board packs a punch with 2x3W D-class PAM8403 amplifiers, making it an ideal choice for those seeking a compact yet powerful audio solution. 2.Versatile Compatibility: With its LRG three-line input, this digital amplifier board is compatible with a range of devices, including LCD TVs, monitors, laptops, portable speakers, portable CD players, game consoles, smartphones, and hands-free telephones, making it a versatile addition to your audio equipment. 3.USB Powered: With the ability to be powered by USB, this audio speaker sound amplifier board provides convenient and flexible power options, allowing you to use it anywhere with ease. 4.Efficient Performance: Featuring D-class amplifiers, this dual channel power amplifier board delivers efficient performance with less heat generation, ensuring long-term stable operation and energy efficiency. 5.Easy to Install: Measuring just 25x18x2mm, this 2 channel audio amplifier module is easy to install and can be used for DIY projects to enhance your audio experience.