Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Great, except for one thing

The trimmer works perfectly in every sense. The only thing that kills it is the fact that they decided to include an AC adapter that only works with 120 volts. In other words, if you travel, you can't charge this trimmer in most other countries. I don't think it's that much more expensive to include an adapter that accepts 110-230 volts. My last Norelco trimmer that lasted 7 years could accept 110-230 volts and was always with me in my travels.Items such as trimmers, shavers, cell phones, laptops, etc. all should accept 110-230 volts, since they are mostly travel items.