Features: Experience quality TDA7377 Amplifier Board, delivering 35W+35W of power for a truly immersivesound experience. This amplifier module ensures excellent signal transmission and durability. Perfect for music enthusiasts and DIY enthusiasts, this amplifier board is for creating your own home audio system or enhancing your existing setups. The TDA7377Stereo Amplifier Board provides the perfect solution for all your amplification needs. Elevates your experience with the TDA7377 Amplifier Board,unleash the full potential of yourspeakers and enjoy clearersound like never before. Specifications: Power supply voltage: DC9-18V, recommend12V Output power: can be connected to 4-8Ωspeakers, with 2x35Wstereo (18V4Ω) Input method: 3.5mmaudio input/3Pexpansion input port Protections: power input reverse protections, short circuit, overcurrent, overheating PCBsize: approx 58.67x55.12mm/2.31x2.17in Potentiometer handle opening: 7mm Overall (including heat sink): approx 90.56x55.12mmx26.65mm/3.56x2.17x1.05in Package Includes: 1PC TDA7377 Digital Power Amplifier note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-2cm error due to manual measurment.