The LD2410D is a stationary human presence sensor consisting of minimalist 24 GHz sensor hardware and intelligent human micro-motion sensing algorithm firmware. The hardware features an AIoT millimeter-wave sensor, a high-performance 24 GHz transmit-receive antenna, and peripheral circuitry. It utilizes millimeter-wave radar distance measurement technology and the radar chip's advanced proprietary radar signal processing to accurately sense motion, micro-motion, and human presence.The human presence sensing intelligent algorithm firmware is mainly used in indoor scenarios to sense whether there is movement, micro-movement or the presence of a human body in the area, and refresh the detection results in real time. Supported frequency band: 24GHz-24.25GHz Sweep bandwidth: 0.25GHz Maximum equivalent isotropic radiated power: 11dBm Add power supply voltage: 5V Dimensions: 7x35mm Ambient temperature: -40 - +85 Average operating current: 50mA Data refresh cycle: 165ms Detection range: static equal 4m / dynamic equal 5m Distance resolution: 0.75m Detection angle: 60 Distance measurement accuracy: 0.15 m (The product printed words depending on the batch, but this does not affect use) Color:As Shown Material:PCB Package Contents: 2 * 24G FMCW Radar 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.