Keep your beloved iPhone safe and mounted securely to your frame with Tate Labs' CycleX iPhone Mount HRM Bundle. You'll be able to track your progress on your preferred fitness app and train while keeping track of your heart rate throughout your ride using the included 4iiii Viiiiva heart rate strap. Compatible with iPhone 55s, the mount locks onto your handlebar frame with two bolts, and can be set to either portrait or landscape position. The case offers protection from water, and as you'd expect from Tate Labs, it's prepared to take on a few bumps and scrapes. It also doesn't interfere with setting the phone to HD video or camera function, so you're free to document the view from a steep descent or a tight switchback without stopping to take the case off. The included Viiiiva heart rate strap communicates with ANT devices as well as Bluetooth enabled smartphones. It allows you to track your progress on 4iiii's own fitness app, but also integrates easily with your cycling app of choice. Once it's set up, you'll be able to check your heart rate mid climb with a quick glance down at your phone without a break in your cadence.