We ordered the IDS WLX 80 wireless sensor. The sensor was delivery the next day, but did not work. Homesecurity1st said they will replace the unit the following Monday. Monday came, nothing. I followed up the next day, they said Wednesday, Wednesday came, nothing. I followed up the next day, they said they are waiting for stock. We asked for a refund, but they want us to retun the unit first. Now I have a non function sensor and they have my money. After all the empty promises, I dont trust these guys will refund me.