Barometer Clock:Metallic navigation instrument can be decorated for car boat RV etc. Temperature Meter:Fine and clear dial, easy to read scale. Hooking hole available with adjustable port Humidity Meter:High quality vacuum ion plating surface treatment for strong corrosion resistance Boat Barometer:The main material of the product is zinc alloy, some aluminum, plastic, copper and so on Yacht Barometer:Each product is equipped with a shock-proof washer that reduces vibration after installation on the vehicle and reduces the impact on the accuracy of the movement Features: Metallic navigation instrument can be decorated for car boat RV etc. Fine and clear dial, easy to read scale. Hooking hole available with adjustable port. High quality vacuum ion plating surface treatment for strong corrosion resistance. The main material of the product is zinc alloy, some aluminum, plastic, copper and so on. Each product is equipped with a shock-proof washer that reduces vibration after installation on the vehicle and reduces the impact on the accuracy of the movement. Specifications: Name: Barometer, Clock, Temperature and Humidity Meter (optional) Material: Zinc Alloy + Aluminum + Plastic + Copper Color: Golden, Silver (optional)Product Range:20-100/ 0-30/ 20-100% 20-100/REL.Clock Face Diameter:7.2cm/2.8inBase Diameter:5.7cm/2.2inProduct Height:3.5cm/1.4inPackingSize: 11 x 5.3 x 11.2cm/4.3 x 2.1 x 4.4in Package List: 1 * Meter(Battery is not included) 10 *Screws