Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Package is too hard to open; no power on/off option

The package is difficult to open.One small complaint about the product: there's no power on/off for the outlet. The signal light is always on during the night if you keep it plugged in. I suggest plug it out before you go to bed, or you will feel disturbed feeling its bright blue light on all the night.