Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not One of Nikon's Better Ideas

This is not a very well thought out unit. It has NO "on-off" switch or capability. You have to remove the back plate when you are finished shooting and take the batteries out. You will need to carry extra AAA batteries if you are packing into the National or state Parks. For the money, I would have purchased the Promote Control had I known about this flaw - its does everything the Nikon unit does and more.