Bike Speedometer, Bicycle odometers,Bicycle Speedometer Wireless Cycle Bike Computer Waterproof Bike Odometer with LCD Display Speedometer Accurate Speed Tracking & Multi-Function

Easy install

as many people stated "YOU GET WHAT YOU PAY FOR"the instructions are very confusing , first of all it does not tell you anywhere what the icons on the screen mean.I did the whole install process 3 times and did the metric conversion and it still did not work at all.I know a Lot of electronics are made in countries where the metric system is used, but would it be that hard to put an additionalsize chart in inches instead of MM .And honestly there are 4-5 actual wheel sizes out there. Would it be that hard to put those values on a separate chart.I Would not recommend this to anyone!PS one way to know if a product is any good is to see how they list the comments.. If they list all the 5 star good reviews first and all the 1 star reviews last then you know they don't want you reading the poor reviews.If you read the reviews for cateye products the reviews are listed just the way they come in.

Arrived very quickly. Installed easily with non-destructive means so you can always change your mind without damaging your ride. Does have a limited range so getting the transmitter/receiver positions just right was challenging but not insurmountable. Mounted well - even after I screwed it up (upside down) and had to try several positions to get it in range. Still, it works great, I didn't bother with any fancy calculations for wheel size and when tested on a known distance it was well within any reasonable accuracy need. Easy to read (haven't quite got the backlight going yet but it would just suck battery anyway). The low cost of this unit makes it a perfect choice for anyone that just wants to give it a try in tracking time and distances spent with their bike with the added advantage of not being too worried about it in those sketchy situations you inadvertently find yourself in (cause your a knucklehead anyway). Nice extra flashlight in the same mode - use it and lose it, no big loss - and who doesn't love a few extras? Haven't truly researched it yet but replacing the batteries may be a large percentage of the total cost. Get it and if you love it upgrade to the GPS unit for your $5k Specialized or get a spare one of these for your Huffy.

I wish I could buy a product like this that would last longer than 6 months to a year. It worked well for the first few months, then it started registering the speed intermittently which would throw off the biked miles. After a few more months, it stopped registering any speed at all. I changed all batteries, adjusted the sensors and recalibrated the computer multiple times. Sometimes it would work for a few days and then just stop working again.

UPDATE #2: Well, the battery swap only worked for one ride. I messaged the seller again and was sent a code so I could purchase the speedo unit again for free. I installed all the new components and it's working great. Speedometer is accurate as well as the odometer. Very happy, hope it works long-term this time :)UPDATE: the seller responded and asked me to swap out the battery and reset the unit. I did that and the MPH output is back to normal. I still need to tweek the tire circumference setting to get the distance reading to be more in line with the god phone app. But it was only a couple tenths off rather than 4 or 5 miles off when it was misbehaving. So I’ve changed my rating from 1 to 4 stars.Then it stopped working correctly a couple days ago. The MPH output started flickering random numbers that had no correspondence to how fast I was going. The mileage recorded was also wildly inaccurate as I also have an app on my phone that I use for the total miles and ride time. I just like being able to keep track of how fast I'm going while I'm riding, hence the speedo. The documentation suggested that the sensor might be loose. Nope, both that and the magnet were fine. I took out the battery to reset the unit and put the wheel size back in. Another ride today yielded the same wacky results.I messaged the seller about it since I can't return it to Amazon, but I'm assuming I'm probably SOL. Buyer beware!

Just as described.

Bought two of these to install on a kids bike and on an electric scooter. One of the sets came with broken sensor, both sets had nearly dead batteries, so I had to replace them in the working set immediately (and that's 12 volt battery, which is not cheap). Zip ties supplied to fix the sensor and the cradle on the bike were so brittle, that they didn't even withstand straightening them by hand. Out of 8 zip ties supplied in two sets only 3 were usable.Now the functionality: the computer catches the signal from the sensor only if placed within 1 foot range from it. This seriously limits your installation options. Due to this reason the set didn't work on the electric scooter, there the handlebar is ~3 feet away from the wheel. But since it was broken anyways, that's ok. Returning this garbage and will be purchasing something better and wired.