TP-Link Smart Button | Wireless Remote Dimmer Switch | 3-Way Control | Tap & …
Doorbell Button When linked to the Hub, the S200D Smart Button doubles as a doorbell, complete with 19 unique ringtone options for added personalization. S200D communicates with the hub via the Sub-1G Low-Power Wireless protocol, which provides extended battery life for the sensor and a wider coverage area compared to Wi-Fi.