Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: does it have a power light on it
Document: I was installing a shop light in my basement when I had inadvertently tripped the ground fault on all wall outlets. Didn't realize this until the next day. Fortunately, we didn't have a lot in our freezer. A friend recommended this failed circuit alarm with the pass through feature. If your circuit is tripped you will get alarm. The pass through feature is nice.
The "Failed Circuit Alarm" is a very important safety device which warns us when the power supply fails on our oxygen concentrator.
I bought this because we have birds and it is a good way to awaken us in the night if the power goes out causing the furnace to shut off.
Using it to alert me if my freezer loses power.A week after I installed it, it alerted me to a power failure to my freezer, and saved me hundreds of dollars in food.
As described, fast delivery. I installed as a backup alarm for the inside GFI to my septic pump. Works great when power goes out or GFI trips.
I purchased this after discovering my chest freezer was off due to a power surge that popped the circuit that it was plugged in to, but I didn't know this because all the other power was on. It has a very loud alarm if the power goes out.
This thing is loud and has saved me from lossing a freezer full of food!!! !Just plug in and any time the GFI trips or the power is lost at the plug it goes off.Its also bulit right!!! (tough)
This is a great product. It has saved many freezers full of meat for me !!! Our power sometimes goes out in the basement and this alarm will sound very loud so we hear it upstairs. Then we can reset the breakers. Thanks
Had A GFI that kept shorting and wanted to monitor it, this in-expensive device works well , and is loud enough to let you know when you lose power on an outlet  Great Product
I bought these to let me know if my basement was about to flood as a result of lost power. Not really loud enough to rouse you from sleep, especially if it's upstairs and you're in the basement. Still, not bad, and better than nothing.
Answer: yes