If you happen to need a Bicycle Speedometer， you are at the right place. The Practical Wireless Waterproof Bicycle Speedometer SD-548C Black we are offering here is just the thing you want. It features high quality material and easy operation even for green hand. 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. 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. Believe us， you should not miss it!                                    Features             Large LCD screen design allows conveniently use<br> Simple and humanized operation interface <br> The liquid crystal display function<br> Suitable for all kinds of bicycles and front fork<br> Detachable fixed seat， can be quickly removed while parking<br> Large buttons for your convenience<br> Good waterproof function can make it through even for the rainy day<br>                                                            Specifications             Model     SD-548C    <br> Color     Black    <br> Battery     23A/12V    <br> Dimensions     (1.77 x 1.77 x 0.59)” / (4.5 x 4.5 x 1.7)cm (L x W x H)    <br> Weight    2.93 oz /83 g     <br>                                                             Package Includes            1 x Speedometer<br>1 x Battery<br>1 x Magnet<br>1 x Ribbon<br>1 x User Manual<br>1 x Gauge Stand<br>