Smart door locks are one of the hardest parts of the smart home market to get into. Given the risks and potential fallout, few seemed to dare promise security married to hi-tech convenience. August dared and, to date, remains one of the top names in that corner of the IoT industry. At CES 2020, it's showing that it isn't done yet even after nine products. Its latest offer slims down the door lock to a more convenient size and includes Wi-Fi from the get-go.