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

IN THE BOX:
For RPM Cadence
RPM Cadence sensor CR 2032 Battery (installed)
Rubber Mounting Option
Zipties
Shoe Mount Option
3M double sided tape
Quick Start Guide
Important Product Info Guide

For RPM Speed
RPM Speed sensor CR 2032 Battery (installed)
Hub Mounting Option
Quick Start Guide
Important Product Info Guide

SUPPORTED DEVICES:
iPhone
iPhone 4S and newer

Android
Click here for compatible devices

iPad
iPad (3rd gen and newer), iPad Mini, iPad Air

iPod
iPod Touch (5th gen)