Instruct: Classify Amazon reviews into positive or negative sentiment
Query: My mistake - the pointer works perfectly.

I ordered and received promptly the laser pointer but didn't think to make sure I had the batteries inserted correctly. I thought the product was defective, contacted the seller and HDE was ready to remedy everything. But then I double checked the batteries, inserted them the proper way and was humbled and happy to see that it worked. I now use the laser pointer in my class everyday as I lecture and project illustrations.