Product Description: SAIKEUNG rainproof bike computer odometer wired odometer bicycle bike bike computer bike computer bike meter This product is made of high-quality materials, finely processed, lightweight, durable, waterproof, high and low temperature resistant. The screen is illuminated, clearly showing the time, average speed, maximum speed, distance, etc. This piece is perfect for cycling enthusiasts. Product Features: 1. Made of high-quality materials, light weight, strong and durable. 2. Waterproof rubber ring to ensure safe use in rainy days. 3. Display time, average speed, maximum speed, distance, etc. 4. Easily installed on your bikes and motorcycles. 5. Perfect for cycling enthusiasts. Specification: Material Engineering plastic ABS electronic componentsDisplay LCD displaySize 5.7*4.1*2.0cmWeight A single box weighs 82 grams Power supply Meter head button battery CR2032*1 Configuration Head*1, base sensor cable*1, magnet*1, cable cable*6, manual*1 The bicycle computer is fine after it soak into water in shonttime or in short moderate: rain or a short period of heavy rain,But do not recomended a long time in thewater,To avoid the malfunction due to water ingress