"Here's a closer look at what you can expect from all three of Nest's new home security products. Nest SecureEasily the most elaborate product introduced by Nest, Nest Secure actually uses three different components to secure your home. The Nest Guard circular base unit looks like a smart home speaker that's been cut by a third. It features a keypad for arming and disarming your home alarm. Nest GuardThere's also a panic button on the back of the Nest Guard, and let me tell you, having heard the alarm when someone pressed it in Nest's demo area, it is good and loud. Nest Guard connects wirelessly to Nest Detect, a compact sensor you attach to either a window or door. The 3. 2 inch sensor also features a nearby magnet; open the door or window, and a magnetometer in the Detect is triggered, sounding the alarm. In a particularly handy feature, there's a button you can press on the Nest Detect that disarms the sensor so you can open the door without bothering everyone in the house with an alarm; the sensor rearms when the door is shut. Nest DetectThe final piece of the puzzle is Nest Tag, which attaches to your keyring. It allows you to tag in and out of the house for those times you don't want to fiddle with the keypad on the Nest Guard.