One of the most important decisions for your new camera or transmitter is choosing a good clean power supply such as this individually-boxed 24-Volt AC 40VA Fused UL adapter. This class 2 transformer is UL listed and certified for reliable and safe operation. This AC power supply is designed to work great with our security cameras and your security panel. The adapter features screw terminals and a green LED indicator. The primary power should be 120-Volt and 60 HZ.