Dimensions
Size comparison
Echo Show 21A28
| Echo Show 21 | A28 | Difference | |
|---|---|---|---|
| Height | 340 mm | 238 mm | +102 mm |
| Width | 540 mm | 150 mm | +390 mm |
| Depth | 38 mm | 200 mm | −162 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is Echo Show 21 better than A28?
Echo Show 21 has no measurable advantages in this pair.
Why is A28 better than Echo Show 21?
A28 has no measurable advantages in this pair.
Specifications
Side by side
| Sound | ||
| Output power | — | 150 W |
| Lowest frequency | — | 45 Hz |
| Highest frequency | — | 20,000 Hz |
| Battery & charging | ||
| Mains powered | Yes | No |
| Battery powered (portable) | No | No |
| Connectivity | ||
| Wireless | Yes | Yes |
| 3.5 mm jack / AUX | — | Yes |
| Optical input | — | Yes |
| Smart & streaming | ||
| Wi-Fi | Yes | Yes |
| AirPlay | — | Yes |
| Chromecast / Google Cast | — | Yes |
| Multiroom | — | Yes |
| Voice assistant | Alexa | — |
| Voice assistant built in | Yes | Yes |
| Screen | Yes | — |
| Design & build | ||
| Weight | — | 3,400 g |
| Width | 540 mm | 150 mm |
| Height | 340 mm | 238 mm |
| Depth | 38 mm | 200 mm |
| Colours | Black | — |
| Features | ||
| Remote control | — | Yes |
