This is a small-size switching power supply for surveillance cameras. After receiving the goods, the customer will test it in the distribution box of the camera. All parameters are OK. This is a customer who is doing security engineering. Although the first cooperation only took two samples for testing, it has expressed the willingness to cooperate with us for a long time, saying that our products are full of power and have multiple protections. Providing perfect after-sales service is exactly the satisfaction of the power they are looking for!