Introducing the GBD-300 series, which supports active users from G-SHOCK's sport line G-SQUAD. [Shock-Resisting Construction & 20 Bar Waterproof] Adopts a shock-resistance to shock and vibration. Equipped with 20 bar water resistance, it can be used in a range of places and settings. [mobile link function] You can link functions with compatible smartphones via Bluetooth R communication. [training function] Compute and display distance, rate, etc., using an axle sensors, autopause function, ON/OFF switching function for reach reminders, setting an ON/OFF switch for reminders, training display (measuring time, distance, face, lap time, lap distance, (Lap PACE, AVERAGE PACE, SPEED, AVERAGE SPEED, CALORIE TABLE) Please check the [Other Product Specs] description box. Be sure to check the detailed product description at the bottom and what to keep in mind when making a purchase before making a purchase! To request a return or exchange, please note that it is mandatory to provide a video of the unpacking of the package.