It will charge a phone battery of 4000 mah *ten times*
it will charge *four different phones* at a time.
A four different phones with 4000mah battery each will be charged twice, becos they will consume 16000mah of 40000mah twice
red and black colour
fast charging data 3 cable
4 output with 5v/2.1a
3 different input of 5v/2a
*goodnews* 40000mah powerbank with a free gift of 3 head data cable