Dimensions
Size comparison
Echo Show 21Home 400
| Echo Show 21 | Home 400 | Difference | |
|---|---|---|---|
| Height | 340 mm | 219 mm | +121 mm |
| Width | 540 mm | 300 mm | +240 mm |
| Depth | 38 mm | 150 mm | −112 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is Echo Show 21 better than Home 400?
Echo Show 21 has no measurable advantages in this pair.
Why is Home 400 better than Echo Show 21?
Home 400 has no measurable advantages in this pair.
Specifications
Side by side
| Sound | ||
| Speaker channels | — | Stereo |
| Dolby Atmos | — | Yes |
| Hi-Res Audio | — | Yes |
| Stereo | — | Yes |
| Battery & charging | ||
| Mains powered | Yes | Yes |
| Battery powered (portable) | No | No |
| Connectivity | ||
| Wireless | Yes | Yes |
| USB-C | — | Yes |
| 3.5 mm jack / AUX | — | Yes |
| Smart & streaming | ||
| Wi-Fi | Yes | Yes |
| AirPlay | — | Yes |
| Spotify Connect | — | Yes |
| Multiroom | — | Yes |
| Voice assistant | Alexa | Siri |
| Voice assistant built in | Yes | Yes |
| Screen | Yes | — |
| Companion app | — | Yes |
| Design & build | ||
| Weight | — | 4,200 g |
| Width | 540 mm | 300 mm |
| Height | 340 mm | 219 mm |
| Depth | 38 mm | 150 mm |
| Colours | Black | — |
| Features | ||
| Hands-free calls | — | Yes |
| Party / stereo pairing | — | Yes |
