Features: YOU WILL GET 1*Speedometer(Battery-included), 1*Anti-vibration gasket, 1*Wireless probe-sensor, 1*Magnetic-head, 1*Nylon tie, 1*Rubber-ring, 1*Wireless base. Comes with a 12032 Button cell-battery. Long lifespan with low energy consumption. FSTN screen ensures an all-around view from any angle. Backlit display (ONLY for model A) assists in clear view even in night outdoor activities. Automatic standby mode is on when no signal input for 4 minutes; Automatic wake-up into working state when vehicle movement is detected.