Features: 100% Brand new and high quality! This module has short circuit protection DIY Mobile Power Supply 5V output for charging Phone MP3 MP4 PSP etc 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: 59mm x 21mm x 17mm Package includes: 1x Step down module