ITEM NAME:QC3.0 QC2.0 Step Down Converter Charging Circuit Module 12V 24V 6-32V DC-DC FT.Car charging retrofit. 1 Pcs DC-DC Step Down Buck Converter Charging Module. Output Power. 24W (5V, 3.4A, 9V, 2.5A, 12V, 2A, etc.). Output overcurrent and short circuit protection. Supports multiple fast charging protocols.