Designed for retrofits, Alfred International’s Alfred ML2 Smart Mortise Lock can be installed to upgrade most standard mechanical mortise door locks without replacing or rekeying them. Bluetooth connectivity is standard. The touchscreen integrates with the Alfred Home App to allow users to remotely monitor and operate their lock; the manufacturer claims that encryption and tamper-proof technology protect against unauthorized access. The ML2 integrates with smart home systems, including Amazon Alexa and Google Assistant. Pricing starts at $650. alfredlocks.com