Feature:

This module has short circuit protection
DIY Mobile Power Supply, 5V output for charging Phone, MP3, MP4, PSP, etc
Input voltage: 6V-40V
Output voltage: 5V
Output current: 3A
Conversion efficiency: 92%

Specifications:
Working temperature: -40 to +85 degree Centigrade
Switching frequency: 150KHZ
Color: Red
Size: 59mm x 21mm x 17mm /2.32 x 0.82 x 0.67 In

Package includes:
1x Step down module