Wahoo Fitness Wahoo RPM speed cycling sensor

RPM SPEED SENSOR (ANT+/BLUETOOTH SMART™)
• Dual band Bluetooth Smart (4.0) / ANT+ cycling speed sensor
• The Wahoo RPM speed sensor is the sleek, magnet-less solution for capturing cycling speed data
• Easily mounts to your bike's front wheel hub, and the Bluetooth 4.0 and ANT+ dual band technology
• Allows you to connect to and display data on both smartphones and GPS bike computers
• Tracking speed data has never been this easy
• This sensor with an App combination transforms your iPhone, iPad, iPod touch or Android device into a powerful cycling computer
• Durable and easy to use
• Small with low drag profile
• Sends and receives signals up to 10 feet unobstructed
• Waterproof up to 5 feet (IPX7)
• Replaceable 3 volt CR2032 coin cell battery
• Wireless: Bluetooth Smart/ANT+
• Compatible Devices: iPhone 4S & newer, iPad 3 & newer, iPod Touch 5th. gen & newer, Android Samsung S3 & newer, HTC One, plus select LG, Motorola, Nexus and Sony models
• 7 grams