Instruct: Classify the given Amazon review into its appropriate rating category
Query: Three minute operating limit

I use a laser to identify potential routes through wooded areas that will require the least tree cutting. There was no info supplied with my pen but I found out after searching the net it shouldn’t be used longer than 3 minutes at a time to avoid damaging it. Also, the switch must be held down to operate so it’s not useful as a tool. Still, it’s a pretty cool gadget. Gave mine away. Hopefully can find one for a little more $ that can be used longer