DROK DC-DC Converter Buck Regulator 5V-30V to 0.8-29V Constant Current/Voltage Power Supply Module 5A, LED Ammeter Voltmeter Display
Features:Module Properties: non-isolated step-down moduleRectification: Non-Synchronous RectificationInput voltage: 5V-30VOutput voltage: 0.8V-29VOutput Current: 5A (over 3A should enhance heat dissipation)Conversion efficiency: 95% MaximumSwitching frequency: 300KHzOutput ripple: 50mV (max) 20M BandwidthLoad regulation:  0.5%Voltage regulation:  2.5%Working temperature: -40 c to +85 cSize: 51 * 26.3 * 14 (L * W * H) (mm)LED Meters:Accuracy: 0.1%Refresh rate: about 200ms timeDisplay: Dual 4 0.28 "digital tubeCurrent Range: 0A-5AVoltage Range: 5V-30VOperating current: less than 15mADisplay color: redStorage temperature: -10 c to +65 cInput impedance: 50 milliohmsSize: 51 * 26.3 * 10mmPackage Include:1x DC Boost Power Module+Volt Amp Meter