The original 40-hour long battery life is still competitive.  By adding dual-star positioning of Beidou and GPS, the speed and accurancy of GPS was greatly improved and you will experience what is flash speed of GPS; iGS50S is comprehensive as it supports the new version of iGPSPORT APP, tracking, auto lap recording, warning reminders, and tones of button can all be set through the APP. In addition to ANT+, the transmission protocol has also been upgraded to version 5.0 for Bluetooth, It will synchronize data faster and supports Bluetooth sensors connection.