Features: Experience superior audios efficiency with our Mini Digital Amplifier Board Module, utilizing Class D amplification technology to achieve over 90% efficiency, minimizing heat generation and maximizing energy savings. This compactly module supports wide input voltages ranges of 2.5V to 5V, making it versatile for various power sources like USB port from computers or powerbanks, delivering 2x3W output power ideal for small speakers and portable devices. Perfect for DIY enthusiasts, hobbyists, and anyone seeking to enhances their audios experience in compactly space, this amplifier board caters to a broad audience look for quality sound solution. Ideal for space constrained applications such as DIY projects, portable gadgets, and compactly speaker systems, the module's small size ensures seamlessly integration without compromising performances. With builts in overloads and short circuits protections, along with compatibility with multiple audios sources like smartphones, tablets, and computers, this amplifier board guarantees safe and reliable operation while offering excellent sound claritys and low distortions. Specifications: Component:Plastic Size:Approx.23x24mm/0.9x0.94inch Working Voltages:2.5-5V Peakness Working Voltages:5.5V Package Includes: 5pcs Digital Amplifier Module note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.