ITEM NAME:DC-DC Step Up Down Boost buck Voltage Converte Module LM2577S LM2596S Power N2 Z a.imagelink a:hover.imagelink {color:#db3606;.Output short circuit protection: Yes, constant current. Full load temperature rise: 45 ℃. Output: OUT+ output is positive, OUT- output negative. Input: IN+ input Positive is, IN- input negative. Module Size: 43 x 20mm.