Dimensions
Size comparison
Echo Show 21M40
| Echo Show 21 | M40 | Difference | |
|---|---|---|---|
| Height | 340 mm | 710 mm | −370 mm |
| Width | 540 mm | 250 mm | +290 mm |
| Depth | 38 mm | 296 mm | −258 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is Echo Show 21 better than M40?
Echo Show 21 has no measurable advantages in this pair.
Why is M40 better than Echo Show 21?
M40 has no measurable advantages in this pair.
Specifications
Side by side
| Sound | ||
| Output power | — | 100 W |
| Lowest frequency | — | 38 Hz |
| Highest frequency | — | 22,000 Hz |
| Battery & charging | ||
| Mains powered | Yes | Yes |
| Battery powered (portable) | No | No |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth codecs | — | aptX HD, aptX, AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | — | Yes |
| aptX | — | Yes |
| LDAC | — | No |
| Optical input | — | Yes |
| Smart & streaming | ||
| Wi-Fi | Yes | — |
| Voice assistant | Alexa | — |
| Voice assistant built in | Yes | Yes |
| Screen | Yes | — |
| Design & build | ||
| Weight | — | 12,400 g |
| Width | 540 mm | 250 mm |
| Height | 340 mm | 710 mm |
| Depth | 38 mm | 296 mm |
| Colours | Black | — |
| Features | ||
| Remote control | — | Yes |
