Description: -Adjustable electronic devices' power supply. Provide AC 2.5V-27V/DC 3V-40V input, the output voltage can be adjusted from DC 1.5V to 27V. -Application for motor car, solar power, bus display, taxi advertising screen, GPS, car audio, LED, intercom and monitoring system,etc. Specification: Input voltage: AC 2.5V-27V/DC 3V-40V Output voltage: DC 1.5V-27V Output Current: 3A Max Working frequency: 150KHz Voltage Regulation: ±0.5% Loading regulation: ±0.5% Working temperature: -40? ~ +85? Over temperature protection: Yes Overcurrent protection: Yes Dimensions: 30x20mm Package Includes: 1 Piece 24V to 12V Step down Power Converter Module Note: Highly suggest skilled person to install it. Professional installation is highly recommended