Can this pouch be used with a regular belt? Or only used with the think belt system?
The pouch will work with any belt up to about 2 1/2" wide. That being said, when I bought one more Think Tank pouch I also purchased the TT Pro Speed Belt V2.0 and I wouldn't go back. The belt is solid and supportive, and when you need to take the pouch(es) off (e.g. while driving) it's easy to remove the belt and leave the accessories attached - you can even sling it over your shoulder for carrying.