Test standards:

1. High temperature test: 60°C for 12 hours, low temperature test: -20°C for 12 hours.
2. Hand sweat test: Thee case does not turn yellow, no peel off the paint, and does not lose the glue in 72 hours
3. Bending test: The bending test was conducted 15 times, and the paint did not crack.
4. Hardness test: Load 1KG, use a China 1H pencil, and conduct a grit test.
5. Salt spray test: 48 hours.
6. RCA paper tape test: UV 250 rounds, alcohol wear resistance test 200 times.
7. Magnet test: Magnetic property test and bracket support test 5000 times.