[LED Lights for Safe Riding]: The bike light is perfect for all situations, whether it's well-lit city bikes, road rides, or dangerous mountain bikes; its high-power LED lights produce high lumens 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 mph/kph, riding time, calories burned, odometer, single trip distance to effectively track your riding, scan Mode has more functions. Sensitive sensor with magnet can accurately track riding speed. The bright LCD backlit display makes it easy to view ride stats. [4-in-1 Bike Computer]: Speedometer + Odometer + 5-mode Headlight (450 Lumens) + 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 our bike handlebars neat and easy to ride. Colour:A: black-blue/B: black/C: black-green/D: black-red Material:plastic Size:11.9 x 5.8 x 9cm Package Contents: 1 x Bike Headlight 1 x USB Cable 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.