Features: This 4pin photosensitive sensing module accurately detects light intensity, making it suitable for smart device applications such as automatic lighting adjustment and environmental monitoring. The module features rapid response times, enabling real-time detection of light changes to prompt triggering corresponding control or alarm systems. It provides both analogues and digital outputs (high/low levels), allowing users to select the appropriate operating mode according to requirements, thereby simplifying the design process. Compared to standard photoresistors, this module utilises high-sensitivity components that better capturing subtle light variations, enhancing measurement accuracy. In robots or automated equipment, the photosensor module enables obstacle detection and avoidance functions, improving operational efficiency and safety. Specifications: Type: Photosensitive sensing module Pins: 4PIN Color: Blue Width about 16mm/0.63in Connection: VCC-VCC Package Includes: 10PCS Photosensitive Sensing Module note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.