Features: Brand new and high quality! This module has short circuit protection- Dual USB output 9V/12V/24V/36V to 5VD CDC vehicle charging 3A voltage reduction and stabilization module DIY Power supply, 5V output for charging Phone, MP3, MP4 etc Approx 30000 hours Long service life without fault. Specifications: Input voltage: 6V-40V Output voltage: 5V Output current: 3A Switching frequency: 150KHZ Conversion efficiency: 92% Working temperature: -40 to+85 degree Centigrade Color: Red Size: approx 60mm/2.36in Package Includes: 1x Step Down Module note: This step-down module, not step up module. Please allow 1-3mm measuring deviation due to manual measurement.