Advanced Radar Technology: The HLK-LD2401 radar sensor module operates on a 24G frequency, providing precise human presence detection through millimeter wave technology. Ideal for automation and security systems. Bluetooth Connectivity: Enhance your project's capabilities with integrated Bluetooth support, allowing for easy integration and remote data management. Versatile Applications: Perfect for use in various environments, including residential, commercial, and industrial settings, where accurate human detection is crucial. Easy Integration: Designed for developers and engineers, this module is user-friendly and supports various applications, making it a versatile choice for your next project. Due to different batches, there may be differences in product appearance and printed text, which not affect use Color: As Shown Material: PCB Package Contents: 5 x Human presence radar sensing module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.