Wahoo RPM Speed and Cadence Sensors Bundle.

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.

Specs:

For both RPM Cadence and RPM Speed

• Part Number: WFRPMC
• Dimensions (LxWxH): 1.25" x.75" x 1"
• Weight: 7 grams (without mount)
• Battery: CR2032
• Battery Life: Up to 12 months
• Water Rating: IPX7 (waterproof up to 5 ft)
• Wireless Signal Strength: Up to 10 feet
• *Note: Speed Sensor is NOT compatible with spin bikes