uxcell AC 24V (16~28V)/ DC (16~40V) Step-Down to DC 12V 2A 24W Power Supply Converter Regulator Waterproof Electronic Transformer for IP Camera Convert unstable voltage between AC 16V and 28V to stable 12VDC 2A output. Si-Fe Cores magnetic loop, high temperature resistance and super stability. The import high heat conduction organic silica gel filling and sealing technology. IP67 Protection grade, waterproof, moistureproof and anti-shock protection. Built-in over/under voltage input, overload, overheat, and short circuit protection.