Usage Tips:[LED Lights for Safe ]: The bike light is perfect for all situations, whether it's -lit bikes, road rides, or dangerous mountain bikes; high-power LED lights high with 4 unique brightness modes, Lighting the road and alerting others of your presence, the two yellow warm lights increase the overall visibility of the road, especially at intersections.[Waterproof Odometer with Horn]: Waterproof bike computer records average speed, maximum speed, current speed /kph, time, calories burned, odometer, single trip distance to effectively your , Mode has more functions. sensor with magnet can accurately speed. The bright LCD backlit display makes it easy to .[4-in-1 Bike Computer]: Speedometer + Odometer + 5-mode Headlight (450 ) + 5-mode Bike Horn (120dB) consists of a bike computer and another 5-mode tail light included in the package. The 4-in-1 bike computer keeps bike handlebars and easy to .Colour:D: black-redMaterial:plasticSize:11.9 x 5.8 x 9cmPackage Contents:1 x Bike Headlight1 x USB CableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.