Bike Speedometer Odometer Cycling Accessories white light Light Rainproof Solar Cell Display Five Languages Solar EnergyInformation about solarcells This bicycle computeris equipped with solar thattransform light energyinto electricityThis extends the useful life of thebattery .However , batteries areneeded for to supplyenergy when it is dark . Bike A / B selectionPress [ SET ] button for two seconds to select bike A or Bike B Application: Road Bike Battery: 2*CR2302 button battery Waterproof: Daily waterproof Installation position: Handlebar Display Five Languages(English, Deutsch, France, Dutch, Espanol) Transmitting distance: the max 80cm Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Colour:Black Material:ABS Specifications: white light Package Contents: 1 x Bracket 1 x Magnet 2 x Rubber Sheet 1 x Sensor 1 x Plastic Belt 1 x Wireless Computer 1 x Rubber Ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.