The Model XR-38 has a regulated output of 13.8 volts at 3A and capable of handing 5A surges up to 30 minutes. The XR-38 is designed to power automotive equipment such as CB radios, stereo systems, mobile two-way radios, and vehicular alarm systems when removed from the vehicle. Features: Input Voltage 120VAC , 60Hz Output Voltage 13.8VDC Output Current 3A Continuous, 5A Surge Load Regulation Less Than 5-Percent Ripple Less than 10mV rms Output Protection Thermal and Short Input Protection 2A, 250V Fuse.