R-Tech DC12V 3A UL-Listed Regulated Power Adapter (for CCTV Security Surveillance Cameras) Input Voltage and Frequency: 100-240VAC ~ 50/60Hz 0.8A Output Voltage and Amperage: 12V 3A (3000mA) Effective Output Power (Watts): 36W Operating Temperature and Humidity: 14F ~ 95F, 15%-80% Connector Size: 5.5mm x 2.1mm