Features: Mechanical odometer, no battery requires, easy to use, precise measurement. Made of good quality materials, sturdy and durable, waterproof, suitable for all weathers to use. Suitable for 26in, 27.5in, 28in, 29in bikes. Easy to install. Let you know the total mileage, single mileage, MPH. With a reset knob, it to make the data clearing. Specification: Material: Plastic Color: as picture shown Size: Approx. 12*8*5.5cm/4.72*3.15*2.16in Weight: Approx. 342g Package List: 1 x Mechanical Odometer 1 x Cable 1 x AdapterSERVICE GUARANTEE:We have a professional customer service team. Please contact customer service in time if you have any questions, we will solve them as soon as possible. Hope you have a good shopping experience. Please allow a slight error due to manual measurement. STRONG COMPATIBILITY:This mountain bicycle speedometer odometer is suitable for 26in, 27.5in, 28in, 29in bikes. Simple installation that only takes a few minutes. WITH A RESET KNOB:Mechanical odometer is designed with a reset knob, swivel it to make the data clear. With a pointer and digital display, you can read your statistics from the bicycle speedometer easily. Let you know the total mileage, single mileage, MPH. WATERPROOF AND STURDY:Bicycle odometer is made of good quality plastic materials, which is sturdy and durable, waterproof, suitable for all weathers to use. NO BATTERY REQUIRES:This bike speedometer is mechanical odometer, no battery requires, which is easy to use, with precise measurement. It is suitable for outdoor and competitive activities.Mounting Type: Handlebar Mount. Sensor Type: Speed Sensor. Item Weight: 342 Grams. Item Dimensions LxWxH: 4.72 x 3.15 x 2.36 inches. Brand: DAUERHAFT. Date First Available: March 8, 2022. Best Sellers Rank: #573,773 in Sports & Outdoors. Customer Reviews: 1.0 out of 5 stars 4 ratings 1.0 out of 5 stars. : B09V38MZ3F. Part Number: ?DAUERHAFTu4zkyefcm33369. Manufacturer: ?DAUERHAFT. Number of Items: ?1. Brand Name: ?DAUERHAFT. Item Weight: ?342 Grams. Item Dimensions LxWxH: ?4.72 x 3.15 x 2.36 inches. Package Weight: ?0.35 Kilograms. Item Package Dimensions L x W x H: ?4.06 x 3.82 x 3.23 inches.