Product parameters：Input voltage: 4-30VOutput voltage: 0.5-30VOutput current: 3A, 4A with cooling fanOutput power: 30W without cooling fan,60W with cooling fanOutput ripple: 30MV (Full output voltage)Conversion efficiency: Boost, 88%-91%; Buck,87%-90%.Short circuit protection: YesWorking frequency: 180KHzSize: 48*23*21mmFeatures:1. it cao buck and boost.no matter how large is the input voltage, the output voltage can be fixed on 12V.when input voltage is 12V, the output voltage can be bucked to 5V, or boosted to 24V.2. it is more efficient, more power than the XL6009-type module.3. the ultra-low output voltage ripplethe output voltage ripple is only 20 mV when the input voltage is 12V, current is 3A, especially for the audio / power amplifier board, analog circuit power supply!4.with a mobile phone charger or battery-powered, you can achieve 0.5 to 30 volts adjustable DC power supply, very convenient!Package Include:1 x Auto Step Up Down Power Supply AT30 Converter Buck Boost Module Replace XL6009