Key features: 

• HD Mini LCD Screen
• 4-Bay Charger - Springs made by piano wire
• Input and output 
• Input: AC 12V/24V
• Output: 4.2V-4X0.5A,4.2V-4X1A,4.2V-2X2A
• USB Output: DC 5V 1A
• USB Output: as a power bank, for charging smartphones, iPads etc
• Over voltage, short circuit protection and reverse polarity protection 
• Auto-stop when batteries are fully charged 
• Compatible with a variety of batteries including 18650, 20700 and 21700.