Color: As shown in the First image. Quantity and size : As shown in the title or description. Smart Gateway Hub-security Alarm Kit Feature: Tuya Smart Gateway Hub:The Smart Gateway Hub is the Control Center of Zigbee Devices.Users Can Design and Implement Smart Application Scenarios by Adding Zigbee Devices PIR Sensor:The Human Motion Sensor Uses Infrared Sensing to Detect the Movement of People or Animals in the Environment,and Works in Conjunction with Other Devices to Design and Implement Smart Application Scenarios Temperature&Humidity Sensor:The T&H Sensor Detects Temperature and Humidity in the Environment in Time and Provide Us with Com For table Temperature and Humidity.And It Shall Also Be Combined with Other Devices to Design and Implement Smart Application Scenarios Door&Windows Sensor:The Door and Window Sensor Detects the Opening or Closing of Doors and Windows,and Monitors Your Home Door and Windows Status Even You Not at Home.Also It Ought to Work Together with Other Devices to Design and Implement Smart Application Scenarios