Matters needing attention: 1. It is strictly forbidden to live working, so as not to unnecessary harm, such as circuit burning or electric shock accident caused by wrong connection2. Avoid installation in hot and rainy areas, so as not to damage the module or affect service life due to environmental factors3. When installing multiple radar modules, try to the antennas of each module are parallel to each other, avoid facing installation, and keep the distance above 1m4. If the shell is designed, the antenna surface of the radar should be kept about 6mm from the shell, and the thickness of the shell should not 3 mm. The material should not be made of metal or metallic paint. PC, plastic, Saigang, etc. are recommended.Default pins: VCC, GND, OUT Number: LD303Manufacturer: Size: 46mm x 8mmVersion: 24GWorking current: 35mAVCC: 5VTransmit : 0.5mWSensing radius: 4MOperating temperature: -30~85 Ccolor:As shownMaterial:PC+MetalPackage Contents:1 x Ranging Radar Sensor ModuleOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.