Specification Brand : YoLink Color : 4 Door Sensors with Hub Label : YoSmart Manufacturer : YoSmart Model : YS1603-UC+YS7704-UC*4 PackageDimensions_Weight : 1.1001066873800001102311310 PackageDimensions : L:7.399999992452 X W:6.49999999337 X H:2.199999997756 PartNumber : YS1603-UC+YS7704-UC*4 ProductGroup : Home Improvement ProductTypeName : HOME_LIGHTING_ACCESSORY Publisher : YoSmart SmallImage_Height : 75 SmallImage_URL : https://m.media-amazon.com/images/I/41bzNDa7vYL._SL75_.jpg SmallImage_Width : 75 Studio : YoSmart Title : YoLink Smart Home Starter Kit: 4 Door/Window Sensors & Hub Kit, Works with Alexa, IFTTT, App for Remote Monitoring, Control and Alerts, Door Still Open (Door Left Open) Alerts Weight : 1.1 WeightUnit : pounds