XOSS Vortex Cadence and Speed Sensor Wireless IPX7 Waterproof Bike Accessories - 300 Hours Dual Modes Bike Sensor ANT+/Bluetooth 4.0 Compatible for Cycling Computer - 2 Pack

I tested two sensors: Cadence was working fine - no issues. Speed - after two rides, the battery was dead... I replaced the battery and again after two rides, the battery was down below 40%. I wanted to replace this faulty speed sensor, but Seller informed me they can do it only within 15 days after purchase and now I need to contact the Manufacturer for a warranty. No contact details were provided: "For warranty purposes please contact the manufacturer. We are only sellers who ship products from the USA. Thank you for your cooperation!"

Buen Producto, cumple lo que promete

They seem to communicate with my Garmin cycling computer well and it seems to be accurate but then again I don't have anything to compare it to. I was happy with them at first but then I realized these sensors are absolute battery hogs. Batteries need to be replaced every couple of months or you end up ready to ride and then realize that the batteries are dead like have happened to me a few times. Yes, you do save $ up front by buying cheap but then you have the hassle of swapping out batteries very often. I ran in to someone yesterday that is using official Garmin speed and cadence sensors, he says he has had the same batteries for over a year. I may just splurge and buy those instead of having to order more batteries and having to replace them every couple of months. Oh, and this happens even if the bike is not used. I've been lazy for the last few months and haven't ridden so therefore these sensors should not be draining the battery but that is not the case.

As if it wasn't enough having to sign up for the XOSS app in order to use it so I can assign one of the sensors to speed, I tried and tried to get it to detect both sensors on a Garmin Edge computer, but consistently, only cadence was detected. In the process of trying to make it work, the battery on the cadence sensor lost almost 5% of its charge. That said-- It does appear to be a high quality item and fits nicely on the crank arm and wheel hub with the supplied pads and bands. This is likely an excellent product if you have a XOSS bike computer, but if you have only Garmin, it's a pain to make it work, and ended up impossible (for me, at least) to detect as a speed sensor.

Very easy to install, great simple instructions, and if your just starting out on your cycle training and are not sure how much of the gear that's out there you need. Start with these!

Unfortunately did not work with my bike or phone.