4 sensor system，double CPU and advanced chipset for enhanced coverage<br /></p> <br /></p><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/558d15db3a3e9e4012dc963a-1-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/558d15db3a3e9e4012dc963a-2-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/558d15db3a3e9e4012dc963a-3-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/558d15db3a3e9e4012dc963a-4-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/558d15db3a3e9e4012dc963a-5-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><p style="text-align: center;"><p style="text-align: center;"><p style="text-align: center;"><p style="text-align: center;"><p style="text-align: center;">