Color: white light wired, white light wireless, green light wired, green light wireless Material: PVC Use battery type: CR2302 Life time: about one month Features: LED backlight, clock, automatic on/off, riding distance, maximum speed, riding speed, metric/imperial alternatives, stopwatch, total distance/ODO, riding time, average speed, scanning Waterproof grade: life waterproof Product accessories: bicycle code table + wired transmitter + rubber ring + shock-absorbing foam pad + powerful magnet + nylon belt *7 + English version of the instructions Screen size: 2.1 inches Product size: 6.0*4.4*1.5CM/1.73*0.24*0.59inch Product weight: 95g Specifications: 1. Daily waterproof: waterproof for life, please do not put the product in the water for a long time, please cover with plastic warp when the weather is bad. 2. Automatic memory function: the function is more stable, the data is more correct, and the service life is longer. 3. Data refinement: detailed display of clock, riding distance, maximum speed, riding speed, metric/imperial alternatives, etc. 4. Super battery life: powered by a button battery CR2032, battery life is about one month, to ensure that the trip will not be dropped for a long time. 5. High-brightness backlight: LED backlight, two kinds of backlight colors can be selected at will, easy to adjust, clear data, safer night riding.   Package Included: 1.bike computer 2. wired launcher 3.rubber loop 4.shake-absorbing sponge pad 5.shake-absorbing sponge 6. strong magnet 7.nylon belts*7 8.English version instruction   or   1.bike computer 2.wired launcher 3.rubber loop 4.shake-absorbing sponge pad 5.shake-absorbing sponge 6.strong magnet 7.nylon belts*7 8.English version instruction