1. Check whether a logo is provided on the product's outer package. 2. If not, confirm the product brand. For a FingerCrystal smart door lock, press 3# and enter the administrator password. The ''0'' key will blink. Press ''#'' to check whether the indicator switches between quick blinking and slow blinking. If yes, it is a Wi-Fi smart door lock. If not, it is a Zigbee smart door lock. For other vendors' smart door locks, remove the module, and check the module type. If the lock uses a ZS5 module, it is a Zigbee smart door lock. If the lock uses an E1S module, it is a Wi-Fi smart door lock.