Duration: Varies - See Charm Duration table below for exact durations
The success rate of this ability is greatly affected by CHR, and can be estimated with Gauge.
CHR also increases the resistance against Charm (from a monster that uses charm).
Some gear will give Charm +, which does not affect the charm success rate, but increases the duration of the Charm (from the initial value based on the level difference between the beastmaster and the pet).
It has been reported that +1 charm seems to increase the duration of charm by 5%. +20 charm doubles the duration of charm. +Charm Test