Solution: law enforcement recorder product with infrared night vision function, can use at night. But different type of infrared open means:

SDV01 (old) by external infrared lamp: brightness is lower in the environment, customers on the product side "" port (USB) above external infrared lamp. The infrared lamp purchasing accessories for the customer, manufacturer is not standard;

SDV02, SDV03, SDV04 divided into manual and automatic infrared infrared two modes:

Automatic infrared open means: the system automatically sensing the environment brightness, when environmental brightness is low, the infrared lamp open automatically.

Manual infrared open means: long to profile products according to the "" button for 3 seconds, can open the infrared function, the camera near infrared light; Once again, long press the button for 3 seconds, can shut down the infrared function, the lamp goes out.