The listing is for 6 detectors. You get 2 boxes of 3 detectors for a total of 6 detectors.

The LS Home Photoelectric Smoke Alarm is a reliable and essential home security device that operates on a 9V battery, ensuring continuous protection even during power outages. With a sleek white color and a diameter of 5 inches, this smoke alarm is easy to install and operate. The alarm features a big button test function for easy maintenance and is backed by a 5-year manufacturer warranty. This 6-pack unit includes batteries and is designed to detect smoke quickly, providing peace of mind for you and your family.