# eufy eufyCam S4

*eufy / T81721W1*

> The eufy eufyCam S4 is a three-lens wireless camera that combines a 4K bullet camera with a pan-tilt camera, with a 5.5 W solar panel and a 10,000 mAh battery. It works with Alexa and Google Assistant. It suits Google Home and Alexa users, with native support through the maker's cloud. Home Assistant users reach it through an integration (the maker's cloud). It does not support HomeKit.

- Canonical page: https://smarthomecanon.com/devices/eufy-eufycam-s4
- Last checked: 2026-10-20

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [eufy](https://smarthomecanon.com/brands/eufy) |
| Category | Camera |
| Model numbers | T81721W1 |
| Status | Current[^1] |
| Type | Bullet-PTZ camera[^1] |
| Resolution | Bullet 4K, PTZ 2K + 2K[^1] |
| Power | 10,000 mAh battery, 5.5 W solar panel[^1] |
| Local storage | 32 GB built-in, microSD up to 256 GB[^1] |
| Hub or recorder | Works alone or with HomeBase S380[^1] |
| Voice and smart home | Alexa, Google Assistant; not HomeKit[^1] |

## Integration paths

**How the eufy eufyCam S4 connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Proprietary + hub](https://smarthomecanon.com/protocols/proprietary-gateway) | eufy HomeBase S380[^1] | unknown | unknown |
| [Wi-Fi cloud](https://smarthomecanon.com/protocols/wifi-cloud) | eufy Security app, Wi-Fi network[^1] | unknown | unknown |

**Platform support for the eufy eufyCam S4**

| 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] |  |
| Wi-Fi cloud | [HomeKit](https://smarthomecanon.com/platforms/homekit) | Not supported[^1] |  |
| Wi-Fi cloud | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | withheld | fuatakgun/eufy_security |

## Related pages

- [eufyCam and HomeBase](https://smarthomecanon.com/lines/eufy-eufycam-and-homebase) (line)
- [eufy](https://smarthomecanon.com/brands/eufy) (brand)
- [Proprietary radio with a hub](https://smarthomecanon.com/protocols/proprietary-gateway) (protocol)
- [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)
- [HomeKit](https://smarthomecanon.com/platforms/homekit) (platform)
- [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) (platform)

## Sources

[^1]: eufyCam S4 product page, eufy US store. https://www.eufy.com/products/t81721w1 (manufacturer, checked 2026-10-13)