Features: 80W double channel digital amplifier board with TPA3116D2 chip delivers powerful stereo output and clear auditory enhances sound Features onboards bass/ adjustment knobs and premium metal construction for precise sound customization and durability operation Ideal for DIY auditory enthusiasts, electronics hobbyists, and audiophiles amplification for customized speaker systems or home theater upgrades. Perfectly integrates into home stereo installations, portable speaker projects, or workshop environment requiring powerful auditory solution. Achieves energy efficient 80Wx2 output with minimal heat generation through advanced digital amplification technology,extended use. Specifications: Material: Metal Chip：TPA3116D2 Size: about 59.6x32mm/2.35x1.26in Supply voltages: DC12~24V Output power: 80Wx2 Power efficiency:more than 90% Number of channel: double channel output Package Includes: 5PCS Digital amplifier board note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution