I purchased these sensors during quarantine and never used them. The box is a little beat up from being stored, but everything else is in great shape. The batteries came pre-installed, so those may need replacing. There is an extra battery included. All you need for cycling data, all together at once! The Wahoo RPM Speed and Cadence sensors are both a sleek, wireless, and magnet-less solution. Each mounts easily to your bike and the Bluetooth Smart and ANT+ duel band technology allows you to connect and display data on both smartphone and bike computers.