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8cmMaterial: Aluminum alloy frameBearing: DU bearingR27DU: Uses DU bearing
Soundwaves Frequency: 3~60Hz
[Dual antenna radio] Built in antenna/external extended antenna
Wireless Frequency: 2
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Bike Cycling Speedometer Wireless Waterproof Bike Meter Computer Speed Odometer Baking Accessories 8cmMaterial: Aluminum alloy frameBearing: DUBike Cycling Speedometer Wireless Waterproof Bike Meter Computer Speed Odometer Feature: 1. 77" display screen with night. Real time display helps track speed,distance,date,time,and multiple datas instantly. Waterproof grade IP67 for riding in rainy days. Easy to install onto the handlebar with the provided mount and bands. Note: Distance between head and inductor <5mm when mounted Specification: Material: Plastic Size: 56*45*20mm 2. 2*1. 77*0. 78inch