CIPA's Auto Dimming Rearview Mirror with Compass and Temperature provides the perfect solution to annoying headlight glare at night. Sensors indicate when bright lights are used and dim the mirror glass for comfort and safety. The Auto Dimming Rearview Mirror also offers a disable button for when dimming is unwanted. Additional features include a digital compass and temperature readout. The compass features a bright LED display, and is self-calibrating. The temperature feature displays outside ambient temperature, and can be programmed to display in Fahrenheit or Celsius. First time installations will require routing a power and sensor wire. Vehicles with an existing auto dimming mirror and a 7 pin connector can plug directly in with no fuss. Otherwise, the wires can be tapped using the wire tap provided. Mirror is 10 inches long by 2.5 inches tall, and is a wedge base mounting mirror. This kit includes a mirror, 6.5 ft power wire harness, wire tap, 9 wire ties, temperature sensor, 14 ft temperature sensor wire harness, operation card, wedge button, and an installation guide. Mirror mounting epoxy is not included. Hint: a camlock mount mirror is commonly found on imported vehicles and is removed by turning the mirror 90 degrees, so it is perpendicular to the dash, then pulling down on the mirror. A wedge mount mirror is commonly found on domestic vehicles and is removed by loosening a small screw or clip and pushing the mirror up toward the roof. Made in the USA and FMVSS approved under section 571.111 of Standard No. 111. Note: We do not recommend installing these mirrors if your vehicle has airbag sensors in the headliner, if your vehicle is equipped with OnStar, or if your vehicle is a hybrid model. Installation of this mirror may disable or damage certain components which are critical to the safety features installed on your vehicle. Check with your vehicle manufacturer for more information.