[Enhanced App Control] Download the dedicated app for in-depth settings, customize settings, passcode, and more. the app function is exclusively available for android phones. [Compact Design] Zk 302t is a compact 2.0 channel amplifier board with small size and many functions, delivering a powerful peak power of 30w+30w and 9‑24v wide voltage input. [Versatile Input Modes] Enjoy multiple input modes including , aux, usb sound card, and usb flash drive modes, connecting seamlessly with various playback devices like cell phones, tablets, and more. [Wide Compatibility] Compatible with 4-8ω, 10-50w speakers, and equipped with a comprehensive guard mechanism against overvoltage, undervoltage, overheating, and short circuits. suitable for various audio setups. [ Sound Control] Control knobs for treble and bass allow for customized sound adjustments, providing a stereo dual channel output for a rich, layered sound experience with enhanced bass. Colour:Black Material:PCB Package Contents: 1 x Amplifier board 1 x Screwdriver Only the above package content, other products are not included. Note: Light reflection 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.