DC Step-down Module Of On-board Power Converter $ 19.92 Product information: Model: 12V24V to 4.2V 25A large aluminum housing Type: switching DC regulator Output current: 1~30 (A) Input voltage: 12V or 12V24V (V) Output voltage: 4.2 (V) Output power: 4.2W-126W (W) Operating temperature: - 40~+80 Packing list Converter * 1pcs