REES52 Buck Converter Voltage Regulator DC 9V 12V 24V to DC 5V Power Supply Transformer Charge Adapter Module 4 USB Port Support QC 3.0 2.0 Fast Charging with LED Display Input Volt & Acrylic Shell Power Supply Electronic Hobby Kit

Parameters : Support agreement: QC3.0 QC2.0 Input voltage: 8V-30V Output: 100W (max output of single USB is 25W, current can’t be higher than 3.46A when the output voltage is 5V.) Efficiency: 95% (max) Dimension: L90mm*W80mm*H28mm Weight:170g Operating temperature: -40?-+85?. Application: mobile power bank, phone, Tablet PC, Logger and other electronics powered by USB 5V and 5V, 9V, 12V fast charging. Note : If the charging current of your electronic device is only 1A, you will get 1A charging current even you charge with more than 1A. It is wrong that higher current will charge faster, it has something to do with charging current of your device. Digital LED displays input voltage (digital LED is connected to the back of the protection diode, so the display voltage is lower than the actual voltage about 0.3V). Package includes : 1 X Buck Voltage Regulator