# Atomstack X40 Pro vs LONGER Laser B1 40W: specs and price compared

A sourced, side-by-side comparison of the Atomstack X40 Pro (Atomstack) and LONGER Laser B1 40W (LONGER) among laser engravers. LONGER Laser B1 40W is the cheaper of the two at $789.99.

## Side by side

| Spec | Atomstack X40 Pro | LONGER Laser B1 40W |
| --- | --- | --- |
| US price | $949 | $789.99 |
| Brand | Atomstack | LONGER |
| Released | 2023 | 2023 |
| Laser type | diode | diode |
| Power (W) | 48 | 44 |
| Wavelength (nm) | 455 | 450 |
| Work area (mm) | 400×400 | 450×440 |
| Max speed (mm/s) | 500 | 600 |
| Min engraving accuracy (mm) | 0.01 | 0.1 |
| Connectivity options | USB | Wi-Fi, USB, TF Card |
| Software compatibility | LaserGRBL, LightBurn | LaserGRBL, LightBurn |
| Enclosed design | No | No |
| Weight (kg) | 12 | 8.5 |
| Material compatibility | wood, acrylic, metal, leather, stone, MDF | wood, acrylic, leather, metal, glass, paper, cloth |
| Autofocus | No | Yes |

## Key differences

- Power (W): Atomstack X40 Pro 48 vs LONGER Laser B1 40W 44
- Wavelength (nm): Atomstack X40 Pro 455 vs LONGER Laser B1 40W 450
- Work area (mm): Atomstack X40 Pro 400×400 vs LONGER Laser B1 40W 450×440
- Max speed (mm/s): Atomstack X40 Pro 500 vs LONGER Laser B1 40W 600
- Min engraving accuracy (mm): Atomstack X40 Pro 0.01 vs LONGER Laser B1 40W 0.1
- Connectivity options: Atomstack X40 Pro USB vs LONGER Laser B1 40W Wi-Fi, USB, TF Card
- Weight (kg): Atomstack X40 Pro 12 vs LONGER Laser B1 40W 8.5
- Material compatibility: Atomstack X40 Pro wood, acrylic, metal, leather, stone, MDF vs LONGER Laser B1 40W wood, acrylic, leather, metal, glass, paper, cloth

## Sources

- Atomstack X40 Pro: https://atomstackshop.com/products/atomstack-a40-s40-x40-pro-laser-engraving-machine-210w-wth-air-assist-24w-48w-one-button-switching-laser-engraver-cutter (atomstackshop.com, verified 2026-06-26)
- LONGER Laser B1 40W: https://www.longer3d.com/products/longer-laser-b1-40w-44-48w-output-power (longer3d.com, verified 2026-06-26)

Canonical: https://frontdeskreview.com/gear/laser-engravers/atomstack-x40-pro-vs-longer-laser-b1-40w/
Cite: Per The Front Desk Review, Atomstack X40 Pro ($949) vs LONGER Laser B1 40W ($789.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/laser-engravers/atomstack-x40-pro-vs-longer-laser-b1-40w/
License: CC BY 4.0.