Eufy Security Retrofit Smart Lock+Wireless Keypad - New | eBay
eufy Smart Lock R10 Retrofit | StackSocial
Retrofit Smart Lock E130 | eufy US
eufy Security Retrofit Smart Lock E110+Wireless Keypad, Fits Your Existing Deadbolt + Video Doorbell Dual Camera (Battery-Powered) with HomeBase, No Monthly Fee, Local Storage - Amazon.com
Best Buy: eufy Security R10 Smart Lock Wi-Fi Retrofit Deadbolt with App/Keypad/Electronic Guest Key Access Black T8503J11