Features： 1、Built in Chinese, English, and Russian language switching. 2、Real time driving speed measurement, quick measuring speed, and high accuracy. 3、Sound signal strength level indication, special tone provides signal strength and frequency band recognition. 4、Multi mode warning selection, urban area, highway, mute, automatic mute mode switching. 5、Intelligent frequency conversion, strong anti-interference performances. 6、Compact in size, it doesn\u0027t affect your driving, and it\u0027s easy to install. Specification： Specifications: Main color: black Material: ABS Working voltage: 12Volt Speed measuring range: X-band: 10.525GHz ± 150MHz K-band: 24.125GHz ± 175MHz Ka band: 34.700GHz ± 1300MHz, 35.100GHz ± 1300MHz Laser : 904mn ± 33MHz Strelka pulse duration: - 30ns Pulse cycle: - 25us Item size: 103 * 65 * 28mm / 4.1 * 2.6 *1.1in Item weight: 77g / 2.7ounce Package List： 1 * Car Driving Speed Tester