Please note that, Only valid for K-frequency or KA-frequency, and it makes warning voices only when the frequency is same as above,and when there is a hidden speed traps.but no alarm sound will be issued when the frequency is different, so not every speed measurement point will work, please purchase with caution. Features: Detect any stable or mobile radar speed monitor ahead. Detect any traffic monitor or stable camera (around traffic lights) in advance. Leading you to drive safely and avoid traffic fine. ODM and OEM Technology Service for different places and customers. English / Russian voice warning, OEM language and voice are available. Easy installation and control, available for independent installation and use. Fully 16 bands receiver. Two versions: English version / Russian version.