A:AnswerYes.
It is compatible with the following android phones.
Android products (Android 4.3 or later)
HTC One M8
HTC One Mini
HTC One
LG G2
LG Nexus 4
LG Nexus 5
Motorola Moto G
Motorola Moto X
Samsung Galaxy Note II
Samsung Galaxy Note 3
Samsung Galaxy S3
Samsung Galaxy S4
Samsung Galaxy S5
Sony Xperia Z1
Sony Xperia Z1 Compact
A:AnswerThis is indeed the M-XXL size. As for it working with the FT7, yes it will work with that. It will also sync with a fitness app on your smartphone that has a heart rate feature - Mike@PolarUSA
A:AnswerThe H7 heart rate sensor does not record any data. That is dependent on the app (or watch) it is paired to. Polar's 'Beat' application for example records the heart rate data and allows for analysis after the exercise recording session. - Mike @ Polar USA
A:AnswerThe H7 does indeed offer the flexibility to be used with other devices! For example, it will work with Polar wrist units (new & old) as well as many exercise machines found at your local health club. - Mike@PolarUSA
A:AnswerMany exercise apps (including Polar's 'Beat' application) provide an indication of calories burned when used in conjunction with the H7 Bluetooth Smart heart rate sensor - Mike @ Polar USA
A:AnswerThe H7 heart rate sensor works with fitness applications running on compatible mobile devices. If MyZone has a heart rate feature part of their application and if it's running on a compatible phone, then yes, it will work. Below is a link to Polar's website with more information on the product. - Mike@PolarUSA
https://www.polar.com/us-en/products/accessories/H7_heart_rate_sensor
A:AnswerThe H7 heart rate sensor communicates on the Bluetooth Smart transmission frequency. You'll need to confirm if the original Vivoactive has the ability to receive on that transmission protocol. - Mike@PolarUSA
A:AnswerNo. The H7 communicates via Bluetooth Smart, so the old wrist watches won't read the signal. The upside is that the H7 has a user-serviceable battery, and there are a bunch of smart phone apps and exercise machines that will read and display the signal.
A:AnswerThe H7 heart rate sensor uses a simple coin style battery for power. Replacing it requires nothing more than opening the battery compartment on the back of the sensor and replacing the old with the new. - Mike@PolarUSA
A:AnswerYes it does. :-) I love mine and bought one for my daughter along w the polar loop 2. But yes it will connect to the machine. You will enjoy it!