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The T3-TTlock model has a built-in gateway that can connect directly to WIFI. The X5-TTlock model requires a gateway to connect to WIFI. ● 3 Year Warranty ● TTlock Smart Lock Handle ● Five standard ways to unlock ● App (Bluetooth/WIFI) ● Dimensions: 340*65MM ● Power supply mode: DC 6V (4 alkaline AA batteries) ● Applicable door thickness: 33~100mm Installation * Follow hole drilling pattern and assembly instructions in the manual * Warning! Before closing the door, make sure to test and unlock first via the included physical key and other methods so won’t be lock out. * Use AA Alkaline battery. Other batteries such as rechargeable and Lithium is not suggested as the low battery warning would not work properly. How to use * First download the mobile TTLock app from the Apple Appstore or Google Playstore. * Open the TTLock app and register an account. * Touch the touchpad of your smart lock to initiate, then add your device in the TTLock app. * In the app, you can now add your card, fingerprint, custom code, and etc. * Go to the settings page to modify function of your smart lock as needed. * Test all unlock functions.