Coachsmart connects ANT+ devices to your smartphone.;O-Synce app available for both iOS and Android.;Contents include Coachsmart and twistlock holder;Very flexible, extremely compatible with almost all sensors and devices; nearly completely self-explanatory (Tour magazine 5-2015).;Very good device, intuitive operation, most functions cover all your needs at most rides. Also useful: If you connect your smartphone it will transfer Bluetooth-data to your cycling computer (Roadbike magazine 6-2015).