Matters needing attention: 1. It is strictly forbidden to live working, so as not to cause unnecessary harm, such as circuit burning or electric shock accident caused by wrong connection 2. Avoid installation in hot and rainy areas, so as not to damage the module or affect service life due to environmental factors 3. When installing multiple radar modules, try to that the antennas of each module are parallel to each other, avoid facing installation, and keep the distance above 1m 4. If the shell is designed, the antenna surface of the radar should be about 6mm from the shell, and the thickness of the shell should not 3 mm. The should not be made of metal or metallic paint. PC, plastic, Saigang, etc. are recommended. Default pins: VCC, GND, OUT Model Number: LD303 Manufacturer: Size: 46mm x 8mm Version: 24G Working current: 35mA VCC: 5V Transmit power: 0.5mW Sensing radius: 4M Operating temperature: -30~85 C color:As shown :PC+Metal Package Contents: 1 x Ranging Radar 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.