2.1channel Bluetooth digital amplifier with dualcore TPA3221 Power output: 100W per channel for left and right channels plus 200W for the sub channel, using a 2.1channel configuration and dualcore TPA3221 technology. Dualcore design for stability: two TPA3221 amplifier chips provide reliable performance and balanced audio power. Builtin tone control: easy tuning of and low frequencies for customized sound without external processors. On/off convenience: includes a power switch for simple operation. components: designed with lossless, materials to improve overall sound fidelity. Efficient and protective: TPA3221 core delivers efficiency, low power consumption, clear HD sound, and a comprehensive protection mechanism. Quality and build Quality first, materials: crafted with attention to material quality and overall construction to ensure durability and consistent performance. Clean, professional design: a straightforward, trustworthy amplifier that fits into home audio setups without drawing unnecessary attention. Technical highlights Dual TPA3221 amplifier chips provide robust power delivery, efficiency, and protection features. Bluetooth connectivity enables wireless streaming from compatible devices, simplifying integration with smartphones, tablets, and laptops. Use scenarios Home stereo upgrade: pair with bookshelf or floorstanding speakers in a living room or bedroom for richer, more dynamic sound from a compact amplifier. Desktop or gaming setup: enhance computer audio and multimedia playback with Bluetooth audio streaming and improved mid/ clarity. Small home theater or media room: serve as the amplifier for a compact AV arrangement, delivering improved dialogue clarity and richer overall sound when connected to a TV or media player. This description preserves the original model and feature set while presenting clear, customerfocused benefits and practical use cases in plain, professional English.