ITEM NAME:3V to 5V 1A DC Boost Power Supply Module Booster Step Up Circuit Boar Gw.Output Current: Rated 1A~1.5A (Single lithium battery input). Output ripple: 30mV (Max) 20M Bandwidth ( Input 4V, Output 5.1V 1A). Module Properties: non-isolated step-up module (BOOST). Full load temperature rise: 30 Celsius.