LM2596 DC Adjustable Step-Down Power Module LED Voltmeter USB 2.54mm Needle

This module can't support apple device(such as iphone,ipad)
This module power output is affect by the module itself-capacity and pre-and post-class load and other factors; the following data for professional equipment
Wide Input voltage: 4.5-40V.
Output Voltage: 1.25-37V (Adjustable).
Output current: rated current 2A, 3A MAX ( Heat-sink Needed).
If you need its output power greater than 2A/10W, please add with heat-sink.
Conversion efficiency: Up to 92% (output voltage higher, the higher the efficiency).
Switching Frequency: 150KHz.
Rectifier: Non-Synchronous Rectification.
Module Properties: Non-isolated step-down module (buck).
Short circuit protection: current limiting, since the recovery.
Operating temperature: Industrial grade (-40 to +85 ) (output power 10W or less).
Full load temperature rise: 40.
Load regulation: ± 0.5%
Voltage regulation: ± 2.5%
Dynamic response speed: 5% 200uS.
Size:8x4x1.5cm(approx)