Keychron B2 Pro Ultra-Slim vs Keychron K5 Pro
Keychron B2 Pro Ultra-Slim is the cheaper pick at $33.99, roughly 62% under Keychron K5 Pro ($89.24). Keychron K5 Pro offers more keys for full-layout workflows, while Keychron B2 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 B2 Pro Ultra-Slim | Keychron K5 Pro |
|---|---|---|
| Name | Keychron B2 Pro Ultra-Slim | Keychron K5 Pro |
| Brand | Keychron | Keychron |
| Price range | $33.99 – $39.99 | $89.24 |
| Community score | — | — |
| Form factor | Full-size (100%) | Full-size (100%) |
| Key count | 104 | 108 |
| Hot-swap | No | Yes |
| Supported switch pins | 3, 5 | 3, 5 |
| Case material | — | — |
| Plate material | — | — |
| Mounting style | — | — |
| Connectivity | Wired USB-C, Bluetooth (5.0+), 2.4GHz wireless (dongle) | Wired USB-C, Bluetooth (5.0+) |
| RGB lighting | No | Yes |
| Layouts supported | — | ANSI |
| QMK support | No | Yes |
| VIA support | No | Yes |
| Weight (g) | — | — |
| Polling rate (Hz) | — | — |
Name
- Keychron B2 Pro Ultra-Slim
- Keychron B2 Pro Ultra-Slim
- Keychron K5 Pro
- Keychron K5 Pro
Brand
- Keychron B2 Pro Ultra-Slim
- Keychron
- Keychron K5 Pro
- Keychron
Price range
- Keychron B2 Pro Ultra-Slim
- $33.99 – $39.99
- Keychron K5 Pro
- $89.24
Community score
Form factor
- Keychron B2 Pro Ultra-Slim
- Full-size (100%)
- Keychron K5 Pro
- Full-size (100%)
Key count
Hot-swap
Supported switch pins
- Keychron K5 Pro
- 3, 5
Case material
Plate material
Mounting style
Connectivity
- Keychron B2 Pro Ultra-Slim
- Wired USB-C, Bluetooth (5.0+), 2.4GHz wireless (dongle)
- Keychron K5 Pro
- Wired USB-C, Bluetooth (5.0+)
RGB lighting
Layouts supported
- Keychron K5 Pro
- ANSI
QMK support
VIA support
Weight (g)
Polling rate (Hz)
Which should you buy?
Keychron B2 Pro Ultra-Slim is the cheaper pick at $33.99, roughly 62% under Keychron K5 Pro ($89.24). Keychron K5 Pro offers more keys for full-layout workflows, while Keychron B2 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 B2 Pro Ultra-Slim if
From $33.99
- You're on a tighter budget
Pick Keychron K5 Pro if
From $89.24
- You plan to swap switches without soldering
- You want per-key RGB lighting
Also compared
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