Ajazz QS87 vs LANGTU LT84Aluminum or 75% Layout
Choose the Ajazz QS87 for its aluminum case and 80% layout, or the LANGTU LT84 for a more compact 75% layout with a multifunction knob and sound dampening.
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Which one should you get?
Get the
Ajazz QS87
Build quality in the top 25% of 80% boards under $100.
- Aluminum case with gasket mount.
- 80% ANSI layout and N-key rollover.
- Bluetooth, 2.4 GHz, and wired USB-C connectivity.
- No numpad.
Get the
LANGTU LT84
Rapid trigger
Build quality in the bottom 20% of 75% boards under $100.
- Compact 75% ANSI layout, with dimensions of 362 x 138 x 29 mm.
- Multifunction knob, with vendor-described volume, brightness, and connection-mode controls.
- Vendor-described triple-layer sound-shock absorption using EVA cotton, bottom rubber, and undershaft silicone padding.
- No numpad.
Choose the Ajazz QS87 if the aluminum case, gasket mount, and 80% layout matter more than a smaller footprint. Pick the LANGTU LT84 if you want a 75% board with a multifunction knob, PBT keycaps, and vendor-described sound dampening. Both offer wireless modes and hot-swap support, so those features alone do not decide the comparison.
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.
Ajazz QS87
LANGTU LT84
Layout size
80%
75%
Rapid trigger
No
Yes
Faster resets help in games and not in normal typing
Mount style
Gasket Mount
Sandwich Mount
Knob
No
Yes
Display
TFT
Yes
A case display rather than a typing feature
- Ajazz QS87
- LANGTU LT84
- Performance
- 7675
- Build quality
- 7350
- Productivity
- 6783
- Customizability
- 7073
- Portability
- 7477
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
What will you mostly use it for?
The QS87 has the edge for buyers who want an aluminum case and a larger 80% layout. The LT84 is the more compact choice and offers the clearest advantages for office controls, screen customization, and sound-dampening features. Gaming is a close call: both share wireless modes, hot-swap support, N-key rollover, and RGB, while each adds different distinct features. Neither model has a numpad.
It's a tie
- Both offer Bluetooth, 2.4 GHz, and wired connectivity, plus N-key rollover.
- Both are hot-swappable and have RGB lighting.
- The LT84 listing names Rapid Trigger, while the QS87 has a gasket mount and an aluminum case.
Ajazz QS87 vs LANGTU LT84 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
8 of 21 specs differ
Ajazz QS87
LANGTU LT84
Switch options
Rapid trigger
Hot-swappable
Mount style
Sound dampening
Layout size
Layout standard
Ergonomics
Knob
Display
Connection
Battery
USB-C
Case material
Keycaps
Weight
Dimensions
Backlight
N-key rollover
Mac & Windows
Released
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Ajazz QS87 vs LANGTU LT84: your questions
The Ajazz QS87 has an 80% layout, aluminum case, and gasket mount. The LANGTU LT84 is a 75% keyboard with a multifunction knob and vendor-described triple-layer sound dampening.
The LANGTU LT84 is the more compact option by its listed dimensions, measuring 362 x 138 x 29 mm. The Ajazz QS87 measures 66 x 178 x 410 mm.
Neither keyboard has a numpad, according to each product’s compatibility rules. The QS87 uses an 80% layout and the LT84 uses a 75% layout.
Both list Bluetooth and 2.4 GHz wireless connectivity, as well as a wired connection. Each also lists USB-C.
The Ajazz QS87 is listed with an aluminum case and gasket mount. The LT84 metadata lists a sandwich mount but does not identify its case material.
Both keyboards are listed as hot-swappable. The LT84 vendor specifically describes full-key hot-swappable sockets and says they work with most aftermarket switches.
Yes, the LANGTU LT84 has a multifunction metallic knob, according to its vendor. The vendor says it can control functions including volume, brightness, and connection mode.
The LANGTU LT84 vendor describes a triple-layer sound-shock absorbing design using EVA cotton, bottom rubber padding, and undershaft silicone padding. The QS87 is listed with a gasket mount, but no comparable layered dampening materials are specified for it.
Both product listings identify a screen and RGB lighting. The QS87’s vendor describes a 0.85-inch TFT color display, while the LT84 vendor describes a colorful display and RGB side strip.
The QS87 has a listed weight of 2450 g. The LT84 metadata does not provide a weight, so the available specifications do not establish which keyboard is lighter.
Both product metadata entries list Mac/Windows support. The Ajazz vendor also names Android among its supported systems.
The LANGTU LT84 is a stronger fit if you want a physical knob: its vendor describes controls for volume and brightness, among other functions. The QS87 instead offers an 80% layout, gasket mount, and aluminum case.
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