If you are using an iPhone 3GS, iPhone 4, iPad or an older device, be advise that pairing won't be possible.
Just like most activity trackers available on the market, ZeFit2 is only compatible with Select iOS 7+ devices that support Bluetooth 4.0 connectivity. Previous iOS version cannot well support the transmission of data via Bluetooth, this is why BLE + iOS 7+ are required.
In order to allow everyone to use ZeFit2, we have developped a PC/MAC software that you can download here. The software will allow you to synchronize your data and configure the watch.