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4. MPPT adjustment voltage is displayed in real time, clear at a glance 3. The chip has enhanced heat dissipation, is reliable and stable, and has high power. 2. All potentiometers can be adjusted manually without a screwdriver 1. Made of high-quality materials, sturdy and 5. Wide range of uses, solar charging, lithium battery charging, LED constant current drive, Manufacturer: Littimoon