Usage Tips:LD306S is a 24GHz millimeter wave radar module, which can be applied to detect the speed of vehicle movement and continuously report the speed information through serial port, and is not affected by temperature, humidity, airflow, dust, noise, light and dark, etc. It has strong anti-interference ability and can penetrate acrylic, glass, plastic and thin non-metallic materials. Frequency: 24.125GHz- Modulation: FMCW Transmit power: 40dBm- Detection distance: Less than 150m (truck/truck up to 350m) Detection angle: horizontal 45 / vertical 90 Power supply: 12V(Typ.)- Current: ~70mA Data interface: RS232/RS485 serial port Detection accuracy: 1KM/H Data format: 9600/8/1 Colour:green Material:PC+Metal Package Contents: 1 x Sensor 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.