1. Our products all use original and brand new chips, and we refuse to use various types of disassembled chips, black chips, white chips, and defective chips. 2. Resolutely use standard power step-down cables, and do not use cheap power step-down cables to save a few cents. 3. The finished camera products are filled with glue and can be soaked in water for 24 hours for testing.. 4. The 6-meter cable for supporting shipment is fully tested and shipped. 5. All finished products have undergone two tests, pre glue testing and pre shipment testing. Minimize the defect rate. 6. Experienced focusing experts with many years of experience, unprofessional people cannot see issues such as focus deviation, dirty spots, light leakage, and color deviation, which are all blocked and cannot be shipped.