Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Is the motion sensor battery operated, too?  I can't really tell from the item description.
Document: I bought this for a business to replace a similar item that quit working. We have a shared entryway and keep our suite door open so we can't use a door trigger bell. One of the best features of this item is that the bell only goes off every 10 seconds or so, so if someone is standing in or near the doorway it won't constantly be going off. I can even walk out into the hallway for a few seconds and come back in without triggering it twice.
I'm very pleased with this product for what we are wanting it to do. I have it set up in my place of employment to detect people walking into our front door. This has really helped us be more aware of customers entering when we can't see them. It comes with many different chimes, but unless you want to hear a song like "Happy Birthday" every time someone comes in your door, you will probably want to stick with the basic single chime.
I replaced this STI unit with another brand that has a sensitivity control and I was able to adjust the sensor to trigger properly. Given my experience with this STI unit, I would not purchase any motion sensor that does not offer a sensitivity control.Additional Note:  There are no adjustments that can be made to this unit to compensate for the lack of a sensitivity control for RF interference.
It senses, plays musical chime and pauses for a few seconds and then senses motion again & chimes again.sensor is good. I use it inside and one sensor covers room and out-through the doors to the room. The receiver electrical plug sticks out the back. so it takes up a lot of space on the socket.It stopped working this morning. Moved the batteries in the sensor and it is working again fine now.Called STI to find a second sensor.
Same description and multiple musical chime choices.I think this isCompatible with all Carlon wireless chime systems.with prime shipping the Amazon prices are good. Some dealers wanted double the price.I also have a DriveWay Patrol sensor alarm which lacks musical chime choices. Slightest movement in room sets it off.I would not use either outdoors. The sensor units are not very .....
STI 46100 Wireless Motion-Activated Chime, Know When Someone Enters Detection ZoneHad the STI unit a month and the receiver now only works sometimes. Sensor works with T&B; and Carlon units so I know the problem is the receiver. Don't know if return is worth the bother, or just buy a $10.00 receiver from competition.__earlier review:Arrived a couple of days ago. Needed magnifying glass to read the settings in the sensor unit.
Really like the functionality of these chimes however they have a tendency to go off at will. I would recommend.
This unit works as expected, but the motion sensor is so sensitive that it alerts on nearby RF signals from two-way radios (yes, RF interference is possible with PIR sensors). The highly sensitive sensor in this unit offers a larger range of area for detection, but also makes it vulnerable to false alerts. The simple fix would be to reduce the sensitivity of the sensor, but this unit does not offer a sensitivity adjustment for the sensor.
It can't take it..Manufacture needs to look into this problem. Amazon may be sending me my 3rd replacement, going to try it one more time if they will send it to me. No reply from them yet, but I have shipped the other one back...
I ordered this item for security purposes. Following the package insert, I tried to change the sound the unit claimed it had. The more I read the instructions, the more confused I became. The unit rang only once and then would not ring at all. I tried following the instructions one more time and it still made no sound. I gave up on this unit thinking the one I received was defective. Because this unit has what I am looking for, I will try one more unit as a replacement.
Answer: yes