Compact fidelity stereo amplifier module that delivers clear 3W + 3W sound in a tiny 3.5 x 3 cm (1.38 x 1.18') package, ideal for portable speakers and DIY audio projects. Key benefits Clear stereo output: PAM8403 ClassD chip provides efficient, lowdistortion 3W + 3W audio for small enclosures and desktop use. USBpowered convenience: Runs on standard 5V DC (USBcompatible), so you can power it from power banks, phone chargers, or USB ports. Stable, lownoise operation: Upgraded 470μF power filtering reduces supply ripple and improves reliability under varying USB power conditions. Integrated controls: Builtin antiwatch potentiometer (volume/power cutoff) and a dedicated power switch eliminate the need for extra external controls. Durable, thermally efficient build: 1.6mm fiberglass PCB supports robust construction and efficient heat dissipation for extended use. What it does for you Simplifies builds: Small footprint and onboard controls let you add amplified stereo output to portable speakers, tiny enclosures, or compact DIY projects without extra circuitry. Saves time and parts: USB power compatibility and integrated volume/power controls reduce wiring and component count. Reliable performance: The PAM8403 amplifier plus enhanced power filtering delivers stable audio with lower background noise and better tolerance to USB power sources. Compatible uses and scenarios Portable speaker projects: Fit into compact enclosures to upgrade or build battery/USBpowered speakers. Singleboard computer audio: Add clear stereo output to Raspberry Pi or Arduino audio projects without bulky amps. DIY electronics and hobby builds: Retrofit small radios, create desktop minispeakers, or integrate into maker projects where space and power are limited. Technical highlights Output: 3W + 3W stereo Power: 5V DC (USBcompatible) Power filtering: Upgraded 470μF capacitor for improved stability Controls: Antiwatch potentiometer (volume/power cutoff) and power switch Construction: 1.6mm fiberglass PCB with PAM8403 amplifier chip Size: 3.5 x 3 cm (1.38 x 1.18') Compact, reliable, and ready to integrate into small formfactor audio applications.