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

Input:
Question: The bullet points say "Contact : NO(Normal Open)" but the "product decription" describes a normally closed switch. Which is true?
Document: I used this for an entreatment center fan switch, worked great . Just remember thats its normally open thats why it says N.O. And when it reaches 40c or 104F it closes.
I am using this to turn a cooling fan on (and off).The switch is normally open (off).I simply taped it to a surface and it worked!When it senses temps over 40C the switch closes (turns on) and turns on a fan I wired it to.When the fan cools the surface the sensor/switch is on, the switch opens and the fan turns off.
I put a couple layers of electrical tape over the sensor so the switch wouldn't cool before the surface it was on.I used an infrared laser thermometer to read the temps and it switches exactly where it claims to.The &#34;head&#34; is a solid metal &#34;lozenge&#34; that appears to be very durable.Oh, it arrived very quickly.
Answer: no