I used this ZK-AS21 amplifier module for my home speaker system, and it transformed the audio experience. The bass is rich and powerful, no issues with installation at all. Highly recommend!
The voltage regulator works reliably for my LED TV. The heat sink is a bit smaller than I thought it might be, but it hasn’t overheated during regular use.
This BMS board functions well for my battery—it provides good protection. The manual is only in English, which I had to translate, but it’s easy to use once I understood the specs.
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