Features:

• High reliability
• Informative backlight LCD
• Multiple load work modes
• Battery type selectable
• USB output 
• Full power operation up to 55 degree
• 
  
• Electronic protections: 
• PV reverse polarity protection
• Battery over discharge protection
• Battery over voltage protection
• Battery reverse polarity protection
• Load short circuit protection
• Load overload protection
• Overheating protection

Specification:

• Rated voltage: 12 V / 24 V
• Rated current: 40 A 
• USB output: 5 V