Keychron J4 vs V5 UltraBudget TKL vs Premium 96% Layout
Choose the Keychron J4 for a compact, budget-friendly wireless TKL, or the V5 Ultra for a high-performance, full-featured 96% layout with an 8K polling rate.
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Which one should you get?
Get the
Keychron J4
Budget TKL
Build quality in the top 30% of 80% boards under $100.
- More affordable price point for a wireless mechanical keyboard.
- Compact 80% TKL layout saves desk space and is easier to transport.
- Features multiple layers of acoustic foam (IXPE, PET, EPDM) for sound dampening.
- North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
- No ISO layout. ISO-DE, UK, and other ISO variants are not offered.
- No numpad.
Get the
Keychron V5 Ultra
Premium 96% Layout
Build quality in the top 15% of 96% boards under $150.
- High 8000 Hz polling rate for minimal input lag in wired and 2.4 GHz modes.
- Large 4000mAh battery with a claimed 660-hour battery life (backlight off).
- 96% layout includes a numpad while maintaining a relatively compact form factor.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
- Compact full-size layout. The numpad is present, the gaps of a full-size board are not.
Your budget and required layout are the decisive factors. If you need a numpad, the absolute best wireless performance, and don't mind the higher cost and larger size, the Keychron V5 Ultra is the superior, feature-rich investment. For users seeking a capable, customizable wireless keyboard in a standard TKL form at a much lower price, the Keychron J4 is a compelling value pick, especially if portability is a priority.
The differences that matter
Skip the 40-row spec sheet. These are the specs that change how each board feels, sounds, and fits your desk.
Keychron J4
Keychron V5 Ultra
Layout size
80%
96%
Max polling rate
1,000 Hz
8,000 Hz
Higher polling helps competitive FPS and does nothing for typing
Case material
ABS
ABS, Metal, Plastic
Knob
No
Yes
Weight
870 g
983 g
Heavier boards stay planted and lighter ones travel
- Keychron J4
- Keychron V5 Ultra
- Performance
- 8291
- Build quality
- 7183
- Productivity
- 8998
- Customizability
- 8994
- Portability
- 7356
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Battery: 4,000 mAh
- Switch options: Clicky, Linear, Tactile
- QMK
- VIA
What will you mostly use it for?
The Keychron V5 Ultra is the clear choice for productivity-focused tasks like office work, programming, and content creation due to its numpad, knob, and extensive battery life. It also leads in high-performance gaming and modding potential. The Keychron J4 wins primarily in portability, thanks to its more compact TKL form factor, making it the better option for travel or those with limited desk space who still want wireless connectivity.
Pick the Keychron V5 Ultra
- The V5 Ultra has an 8000 Hz polling rate in both wired and 2.4 GHz modes, significantly higher than the J4's 1000 Hz.
- Its gasket mount and polycarbonate plate are designed for a softer, quieter typing feel that some gamers prefer.
- It includes N-key rollover for reliable simultaneous key presses.
Keychron J4 vs V5 Ultra specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
12 of 27 specs differ
Keychron J4
Keychron V5 Ultra
Switch options
Hot-swappable
Mount style
Sound dampening
Screw-in stabilizers
Layout size
Layout standard
Ergonomics
Knob
Display
Media keys
Connection
Max polling rate
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Typing angle
Backlight
QMK
VIA
N-key rollover
Mac & Windows
Released
ISO layouts by store
Which stores sell ISO-DE, UK, and the other regional layouts.
Keychron J4
No ISO layout at the stores we track.
Keychron V5 Ultra
Keychron (DE)
ISO-ES
In stockDoes not ship to you
Compare prices
Live prices from the stores we track, cheapest in-stock offer first.
Prices in USD are converted to your currency and can change at any time. KeebFinder may earn a commission when you buy through these links, at no extra cost to you.
Lowest price across stores, Amazon excluded.
Keychron J4 vs V5 Ultra: your questions
The core difference is the layout and performance tier. The J4 is an 80% TKL keyboard with a 1000 Hz polling rate, positioned as a budget-friendly option. The V5 Ultra is a 96% layout keyboard with an 8000 Hz polling rate, a larger battery, a gasket mount, and a knob, representing a premium, feature-packed model.
The Keychron V5 Ultra has a significantly larger 4000mAh battery, with the manufacturer claiming up to 660 hours of use with the backlight off. The J4's listed 1mAh battery is likely a data error, but its capacity is not explicitly stated in a reliable way, suggesting the V5 Ultra will have substantially longer wireless runtime.
Yes, the Keychron V5 Ultra is designed for gaming with its 8000 Hz polling rate in both wired and 2.4 GHz wireless modes, which minimizes input latency. It also features N-key rollover to ensure all simultaneous key presses are registered correctly during gameplay.
Yes, both keyboards are compatible with Mac and Windows systems. The V5 Ultra specifically includes an additional set of keycaps for both operating systems and a system toggle switch, as mentioned in its product description. The J4 also lists Mac/Win support.
Yes, both the Keychron J4 (in its hot-swappable version) and the V5 Ultra support hot-swapping for MX-style switches. This allows you to change switches without soldering, offering great customization flexibility.
The Keychron J4 is more portable. Its 80% TKL layout is more compact than the V5 Ultra's 96% layout. Furthermore, the V5 Ultra weighs 983 grams, making it a substantially heavier board to carry, while the J4's weight is not specified but implied to be lighter.
The Keychron J4 uses QMK and VIA firmware for key remapping and macros. The Keychron V5 Ultra uses ZMK firmware, which is also open-source and programmable via the Keychron Launcher web app for both keyboards.
Only the Keychron V5 Ultra has knob support and is available in a 'Fully Assembled Knob' variant. The Keychron J4 does not have a knob, as this feature is not listed in its specifications or description.
Both keyboards come with double-shot PBT keycaps for durability. The J4 offers Cherry profile (shine-through) or MDA profile options. The V5 Ultra comes with OSA profile double-shot PBT keycaps, which have a spherical shape similar to SA profile.
The J4 has north-facing RGB LEDs, which can provide better shine-through for legends on the top of the keycap. The V5 Ultra has south-facing RGB LEDs, which are less likely to interfere with Cherry-profile keycaps but may provide less direct legend illumination, a point noted in a user review of the V5 Ultra.
The V5 Ultra is likely to have a deeper, softer typing sound due to its gasket mount design, polycarbonate plate, and multiple detailed foam layers (PET, EPDM, acoustic foam). The J4 uses a steel plate and foam, which typically results in a firmer, higher-pitched sound profile.
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