Features: S line design, full of strong athletic temperament. Integral waterproof rubber ring button sleeve to enhance sealing performance. Easy operation and durability,you can control your riding every moment. Specially designed for Bike Bicycle Cycling. Waterproof effect is good, press the button to feel better. Descriptions: You can install it on your handlebar It is Waterproof, you can use it in the raining days. Specification: Material: aluminum alloy Screen size: 1.9 inch Size: 150*60*60mm Application bike: MTB Color: black Battery: 1 x button battery Package Includes: 1 x Mountain Bike Speedometer 1 x Battery Notes: Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.