Note The principle of a fixed road speedometer is to use a ground coil tomeasure speed, and it will not send out a signal. Only a mobilespeedometer will send out a signal. This product is only valid for K-frequency or KA-frequency, and it makeswarning voices only when the frequency is same as above,and when thereis a hidden speed traps.but no alarm sound will be issued when thefrequency is different, so not every speed measurement point will work,please purchase with caution. Introduction to product key operation 1.Plug the product on the car charger, and it starts work 2.Voice adjustment: to press the DN button and UP"button shortly. 3.City Mode/High way mode: (High way mode is the default setting): to press MENU button shortly. 4. Exchange of Language: to press MUTE button for about 10s. Exchange between English and Russian Specifications: Product material: plastic Product weight: 100g Product size: 95*60*30mm/3.74*2.36*1.18 Working voltage: car cigarette lighter 12V Working current: 230mA Working temperature: -30 to +70°C Display type: Digital tube display Reminder type: live voice prompt Language type: English and Russian Applicable models: universal Packing: OPP bag Full frequency radar band: X band: 10.525 GHz ± 100 MHz K band: 24.150 GHz ± 175 MHz K band: 24.125 GHz ± 175MHz Ka Band: 34.700 GHz ± 1300MHz Ka Band: 33.400 GHz ± 1300 MHz VG-2 11.150GHz±175MHz Notes: 1. There may be slight size deviations due to manual measurement, different measuring methods and tools. 2. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor. 1 X Car Radar Detector 1 X Power Cord 1 X Anti Slip Mat 1 X Manual