Product Name: DC-DC step-down charging module
   Load capacity: Maximum output 3A, 2A marathon can
   Scope: mobile power, mobile phones, flat-panel powered devices USB5V
Product Dimensions: L42mm * W16mm * H5mm
Input: 7.5V-28V
Output: 5V / 3A
Conversion efficiency: 96% (Max)
Switching Frequency: 1.5MHZ (Max) Typical 1MHZ
Working temperature: -40 'C - + 85 'C
   1Pcs 5V DC-DC step-down car charger USB Module