The Wahoo Fitness Bike Case for iPhone with Speed and Cadence turns your iPhone into a fully functional cycling computer and GPS. Just mount it, choose your favorite cycling app and hit the road or trail.

Features:
• Built-in ANT+ radio transceiver.
• Fits iPhone 3G, 3GS, 4 and 4S with custom rubber liners to switch between phone types.
• Water and shock resistant.
• iPhone case attaches to bike via leave-on mount.
• Adjustable to portrait or landscape orientation.
• Touch screen cover allows for full functionality.
• ANT+ ultra low power wireless technology sensors track both speed and cadence.
• Universal mounting rail for bicycle mount and auxiliary battery (sold separately).
• Optional Wahoo Fitness auxiliary battery provides over twice the total battery life (sold separately).

Ports and Connectors:
• Earphone jack.
• microUSB connector.
• Front camera port window.
• Rear camera port window (no flash capability).
• Home button actuator pad.

Weight:
• iPhone 4 and case: 8.9 ounces / 253 grams.
• iPhone 3G and 3GS and case: 8.4 ounces / 238 grams.
• Bicycle mount: .4 ounces / 12 grams.