ITEM NAME:2x DC-DC 3A Buck Converter Adjustable Step-Down Power Supply Module LM2596S A#S Product Description Description: Features: 100% Brand New and High Quality. Shape: Same as the picture show Module Spec: Non-Isolated Step-Down (BUCK) Rectification: Non-Synchronous Rectification Input voltage:3.2--35V Output voltage:1.25-35V(Adjustable) Output current:Rated current is 2.5A,maximum 3A(Additional heatsink is required) Conversion Efficiency: 92% (The Highest) Operating Temperature: -45 ℃ To +85 ℃ Module Size: 42mm(Length)*20mm(Width) Included: 2 x Step-Down Power Supply Module.Module Spec: Non-Isolated Step-Down (BUCK). Module Size: 42mm(Length) 20mm(Width). If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item.