Keychron B3 Pro Ultra-Slim vs Block Mechanical Keyboard
Keychron B3 Pro Ultra-Slim is the cheaper pick at $34.99, roughly 79% under Block Mechanical Keyboard ($170.00). Block Mechanical Keyboard offers more keys for full-layout workflows, while Keychron B3 Pro Ultra-Slim trims the footprint. The right pick comes down to which spec trade-offs fit your build — the pick-if grid below breaks that out in detail.
Detailed comparison
Spec-by-spec breakdown — differences highlighted in cyan.
| Spec | Keychron B3 Pro Ultra-Slim | Block Mechanical Keyboard |
|---|---|---|
| Name | Keychron B3 Pro Ultra-Slim | Block Mechanical Keyboard |
| Brand | Keychron | Lofree |
| Price range | $34.99 | $170.00 |
| Community score | — | — |
| Form factor | 75% | TKL (80%) |
| Key count | 84 | 87 |
| Hot-swap | No | No |
| Supported switch pins | 3, 5 | — |
| Case material | — | — |
| Plate material | — | — |
| Mounting style | — | — |
| Connectivity | Wired USB-C, Bluetooth (5.0+), 2.4GHz wireless (dongle) | Bluetooth (5.0+) |
| RGB lighting | No | No |
| Layouts supported | — | — |
| QMK support | No | — |
| VIA support | No | — |
| Weight (g) | — | — |
| Polling rate (Hz) | — | — |
Name
- Keychron B3 Pro Ultra-Slim
- Keychron B3 Pro Ultra-Slim
- Block Mechanical Keyboard
- Block Mechanical Keyboard
Brand
- Keychron B3 Pro Ultra-Slim
- Keychron
Price range
- Block Mechanical Keyboard
- $170.00
Community score
Form factor
- Block Mechanical Keyboard
- TKL (80%)
Key count
Hot-swap
Supported switch pins
Case material
Plate material
Mounting style
Connectivity
- Keychron B3 Pro Ultra-Slim
- Wired USB-C, Bluetooth (5.0+), 2.4GHz wireless (dongle)
- Block Mechanical Keyboard
- Bluetooth (5.0+)
RGB lighting
Layouts supported
QMK support
VIA support
Weight (g)
Polling rate (Hz)
Which should you buy?
Keychron B3 Pro Ultra-Slim is the cheaper pick at $34.99, roughly 79% under Block Mechanical Keyboard ($170.00). Block Mechanical Keyboard offers more keys for full-layout workflows, while Keychron B3 Pro Ultra-Slim trims the footprint. The right pick comes down to which spec trade-offs fit your build — the pick-if grid below breaks that out in detail.
Pick Keychron B3 Pro Ultra-Slim if
From $34.99
- You want a 75% layout
- You're on a tighter budget
Pick Block Mechanical Keyboard if
From $170.00
- You want a tkl (80%) layout
Also compared
Popular pairings that involve Pro Ultra-Slim or Mechanical Keyboard.