The SDL-571 Bicycle Speedometer we are offering here is just the thing you want. It features high quality material and easy operation even for green hand. It is not only convenient but also practical and easy for install. The power saving mode and sleeping mode with auto start function are very considering and environment friendly. You can have the average speed， maximum speed， relative speed， riding time and total riding distance all at the same time. With it， you can check data freely and change your exercising plan immediately as you wish. Believe us， you should not miss it!                                    Features            Large LCD screen design allows conveniently useSimple and humanized operation interface The liquid crystal display functionSuitable for all kinds of bicycles and front forkDetachable fixed seat， can be quickly removed while parkingLarge buttons for your convenienceGood waterproof function can make it through even for the rainy days                                                            Specifications             Color     Black    <br> Power Supply     1 x 3V Battery    <br> Operating Temperature     0℃~50℃    <br> 12/24 Hour Format     Support    <br> Imperial/km Format     Support    <br> Dimensions     17.77 x 0.43 x 1.69" / 4.5 x 1.1 x 4.3cm (LxWxH)    <br> Weight     2.5 oz / 71 g      <br>                                                             Package Includes            1 x Bicycle Computer<br>1x Battery<br>1 x Manual<br>1 x Mounting Strop<br>1 x Magnet<br>1 x Inductor<br>