Attention :This module only be used for which one haven't the identifying resistance  device. most device haven't the 

identifying resistance , but 

Some equipment with identification of resistance, this can't be use.  such as Samsung Galaxy this device ,it have identify resistance , so can't use. Please make sure your equipment before purchase,thanks

Features : 
-Use imported and integrated switching regulator modules manufacturing,
quality is stable and reliable.
- Synchronous rectification,, the conversion rate is 96% or more, very low heat.
- Over voltage, over current, over temperature, short circuit, it can be auto protection,
and can work in normal condition when restored.
- Super-thin, small size, high efficiency, easy installation and use.
- Input voltage: DC8-20V, (12V changes to 5V)
- Output parameter: DC5V3A, 15W

 It was micro usb output