Thank you for viewing. I am selling this because my usage environment has changed and it is no longer needed. This is a set of Sesame 3, Wi-Fi Module 2, and Sesame Bot 1 (3 units). With this set, you can open and close your door remotely and turn devices on and off using switches (up to 3). Please note that the items are as shown in the images. Also, two of the Sesame Bots have short arms, and one has a long arm. The batteries in the Sesame units were almost depleted, so I disposed of them. However, I had new batteries in stock for the Sesame Bots, so I replaced all three with new ones. Although they are used, I think they are a great bargain, so if you're looking to try out a smart home, why not take this opportunity? Thank you for your consideration.