# Tapo TD21

*Tapo / TD21*

> The Tapo TD21 runs on a battery and comes with a chime. It is a 2K video doorbell, and it works with Alexa and Google Assistant. It suits Google Home and Alexa users, with native support through the maker's cloud.

- Canonical page: https://smarthomecanon.com/devices/tp-link-tapo-td21
- Last checked: 2026-10-10

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [Tapo](https://smarthomecanon.com/brands/tp-link-tapo) |
| Category | Doorbell |
| Model numbers | TD21 |
| Status | Current[^1] |
| Type | Video doorbell[^1] |
| Resolution | 2K (2304 x 1296, 3 MP)[^1] |
| Power | Battery (6,400 mAh)[^1] |
| Weather rating | IP65[^1] |
| microSD max | 512 GB[^1] |
| RTSP / ONVIF | unknown |
| HomeKit | unknown |
| Tapo hub | Works with H200 and H500 hubs[^2] |
| AI detection | Person[^1] |

## Integration paths

**How the Tapo TD21 connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Wi-Fi cloud](https://smarthomecanon.com/protocols/wifi-cloud) | 2.4 GHz Wi-Fi network[^1] | unknown | unknown |

**Platform support for the Tapo TD21**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Wi-Fi cloud | [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) | Native[^1] |  |
| Wi-Fi cloud | [Google Home](https://smarthomecanon.com/platforms/google-home) | Native[^1] |  |

## Related pages

- [TP-Link Tapo cameras and doorbells](https://smarthomecanon.com/lines/tp-link-tapo-cameras) (line)
- [Tapo](https://smarthomecanon.com/brands/tp-link-tapo) (brand)
- [Wi-Fi through a cloud service](https://smarthomecanon.com/protocols/wifi-cloud) (protocol)
- [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) (platform)
- [Google Home](https://smarthomecanon.com/platforms/google-home) (platform)

## Sources

[^1]: Tapo TD21 product page (tapo.com US). https://www.tapo.com/us/product/smart-doorbell/td21/ (manufacturer, checked 2026-10-10)
[^2]: TP-Link support: Which TP-Link Tapo Cameras/Devices Are Compatible with Tapo Hub. https://www.tp-link.com/us/support/faq/4191/ (manufacturer, checked 2026-10-10)