Solar Energy Step-down and Step-up Module

In+:Input positive
In-:Input negative
Out+:Output positive
Out-:Output negative
Input voltage:3.5-28V, output: 1.25V-26V
Output voltage:Output voltage (1.25V-26V arbitrary value) is independent of the input voltage (input 3.5V-28V arbitrary value), automatically step-up / down
Input current: 3A
Output current: 3A
Measurements ( L x W x H ): circa 53mmx38mmx21mm