1. There are multiple protection functions: input overvoltage, undervoltage protection; output overcurrent, overvoltage, undervoltage, short circuit protection; reverse connection protection; chip internal high temperature protection. 2. The USB output voltage has three output schemes: 5V3.4A /9V2.5A/12V2A. The content of the agreement includes 2. Fast charging port: DCP BC1.2, Divider3/ 1.2V, QC2.0/QC3.0, SCP, FCP, AFC, Spreadtrum SFCP and other fast charging protocols, which can support super fast Charge 3. Dual USB fast charging, dual fast charging and multi-device don't worry about it 4. Really "safe" real-time voltage monitoring The battery voltage measurement range is DC: 6-30V If the voltage is lower than 12V when starting the car, please replace the battery as soon as possible 5. Wide application Applicable to DC12V vehicles, ships, motorcycles, ATVs, snowmobiles and other vehicles Input voltage: DC12V-24V (V) Output voltage: 5 (V) Output current: 3.4A (mA) Working