Compatibility - Works for ALL door locks powered with TTLock APP and SMONET Branded Smart Door Lock.(Does not support 5G wifi) Remotely Control - Unlock the door remotely even far away from your home, which is no longer to be limited by the Bluetooth unlocking distance. Read records, modify passcodes, and delete E-key anytime, anywhere. Easy Set Up - Easy set up within 2 minutes. Please note the distance between the gateway and the smart door lock is no more than 32 ft to ensure a good signal connection. And your smart phone and the gateway must be connected to the same Wi-Fi network when paring the gateway. Multifunction - Works with Alexa, reach to voice control via Alexa device. One SMONET gateway can match multiple smart door locks. Please Note: If the login failed in Alexa, please fill in the area code "+1" at front of account.