Feature 1Built in Chinese, English, and Russian language switching. 2Real time driving speed measurement, quick measuring speed, and high accuracy. 3Sound signal strength level indication, special tone provides signal strength and frequency band recognition. 4Multi mode warning selection, urban area, highway, mute, automatic mute mode switching. 5Intelligent frequency conversion, strong anti-interference performances. 6Compact in size, it doesn't affect your driving, and it's easy to install. 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