Feature:
How long is the backup time?
First, calculate the power of your device (power = voltage * current)
Second, calculate the theoretical backup time = 32.56wh/power of your device.

Specification:
Input: 12V 2A
Output vole: 5V-12V-12V
Output current: ≤1A
Capacity: 32.56WH/8800mAh/7.4V
Battery: 18650 li-ion 2200mAh cells*4pcs
Item size:11.5*7.4*2.4 cm / 4.53*2.91*0.94 in(L * W * H)
Item weight: Approx.255g /8.99oz
DC cable connector size: 5.5mm/2.5mm (outer/inner diameter)
Three adapter size: 5.5mm/2.5mm (female) to 3.5mm/1.35mm (male); 5.5mm/2.5mm (female) to 5.5mm/2.5mm (male); 5.5mm/2.5mm (male) to 3.5mm/1.35mm (female); 

Packing list:
1 * Mini DC UPS
1 * 5V Output Line
2 * DC Cables
3 * Connectors
1 * User Manual