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LM7815/05/12 + 7915/05/12 Voltage Regulator Module Power Supply Board +/- Dual 12V Rectifier Filter

A14 RS232 to TTL Serial Port to TTL Converter Board Brush Module MAX3232 Chip

3S 12.6V 6A BMS Li-ion Lithium Battery Protection Board 18650 Power Bank Balance Battery Board

-40~99°C 220V STC-200 Seafood Box Refrigeration Unit Direct Cooler High Temperature Cold Storage Temperature Controller