Kospet is offering a new smartwatch with a rectangular display that’s named the Tank M4C. This watch is designed for outdoor enthusiasts and is water resistant up to 5 ATM, so it’s suitable for swimming. The sensor setup is relatively comprehensive and includes an optical sensor for measuring heart rate as well as oxygen saturation. GPS is on board as well, but the Kospet M4C lacks navigation features. Maps cannot be stored on the 1GB internal storage, although music can be saved and played without a connected smartphone.