Waterproof and main functions: speed, clock, average speed, odometer, maximum speed,tachometer,Bike Wired Speedometer Day and night use: provides backlight for easy viewing during dark hoursperfect for daily use,bike computer,Bike Wired Speedometer Multifunction: small size, light weight,waterproof design makes it portable, , comfortable and convenient this computer measures speed, distance, and riding timeideal assistant for training,back light speedometer,Bike Wired Speedometer Applicable: road bicycles, mountain bikes, folding bikes,and other common bicycles are compatible with this computer suitable for most types of bicyclesperfect to use when hiking, climbing, riding and other outdoor actives,speedometer,Bike Wired Speedometer Note:Due to different production batches, the physical lighting is random, and the designation is not accepted, which not affect the use. Color:As Shown Material:ABS Package Contents: 1 * bicycle computer kit 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.