Review on YS Wireless Waterproof Bicycle Speedometer & Odometer With LCD Display & Multi-Functions - Track Your Ride! by Jason Laney

No complaints, even though I'm buying a replacement -- it's my fault when I crossed through water and submerged the part that reads the revolutions. I put 500 miles on it before then and no complaints whatsoever. Try to remember though how to save your data when replacing a battery. Ten seconds is the difference between losing and saving your data. I lost mine, only because I failed to read the directions before changing batteries. Great product and I'm actually installing the second one today. This product is rated a BUY from me.