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, swivel 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 AdapterWith a reset knob, swivel it to make the data clearing. Suitable for 26in, 27.5in, 28in, 29in bikes. Easy to install. Let you know the total mileage, single mileage, MPH. Made of good quality materials, sturdy and durable, waterproof, suitable for all weathers to use. Mechanical odometer, no battery requires, easy to use, precise measurement. Mechanical odometer, no battery requires, easy to use, precise measurement.Sensor Type: Speed Sensor. Item Weight: 342 Grams. Item Dimensions LxWxH: 4.72 x 3.15 x 2.36 inches. Color: defult. Brand: Oreilet. Date First Available: March 30, 2021. Best Sellers Rank: #797,788 in Sports & Outdoors. : B091C6N5W8. Size: ?default. Part Number: ?Oreiletgwqyokham46456. Manufacturer: ?Oreilet. Material: ?default. Brand Name: ?Oreilet. Package Weight: ?342 Grams. Item Package Dimensions L x W x H: ?3.94 x 3.94 x 3.15 inches. Mounting Type: ?Handlebar Mount. Sensor Type: ?Speed Sensor. Item Weight: ?342 Grams. Item Dimensions LxWxH: ?4.72 x 3.15 x 2.36 inches. Color: ?defult. Brand: ?Oreilet.