Tropernic smart deadbolt mate with most existing single-cylinder deadbolt, so no need additional drilling, just replace it and play.
The Brand(single-cylinder) that compatable with A220 smart deadbolt:
Smart deadbolt enables App unlock, NFC(wristband unlock) and passcode unlock. While to make the long distance unlock possible, you could mate the deadbolt with a smart gateway, then you could even unlock it from another city. But our passcode is offline stratogy, you could just programme it even without a gateway.
How to install the smart deat bolt
The Smart deadbolt could be installed on most American wooden doors. Door thickness: 35-55mm
Open direction: Either side, left/right hand open
Battery life: More that 6 months
Communication: Bluetooth 4.0
Wi-Fi unlocking: Possible, bridged by Smart gateway
App Download and introduction
Google PlayApp Store
Down load the TTlock app from Google play or App store. Then register an account and pair up with your smart lock. Then experience the smart entrance without using the physical keys.