The LD2411-S is a motion/micro-motion human sensing range sensor module from the Halingco radar family, containing extremely simplified 24 GHz radar sensor hardware and intelligent algorithm firmware RM01. The LD2411-S hardware consists of a 24 Ghz millimeter wave radar chip, a high performance transmit-and-receive microstrip antenna, a low cost MCU and peripheral auxiliary circuits. The user can adjust the placement direction of the module according to the actual application scenario. Smart algorithm firmware RMO1 adopts FMCW waveform and S3 series chip's proprietary advanced signal processing technology to achieve accurate human body distance measurement and motion / micro-motion body sensing. Colour:blue Material:ABS Package Contents: 1 set of Human body 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.