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| Jamesdonkey A3 | Keychron K2 Max | Yunzii RT75 |
79 Overall/ Value 79.0Build Quality 66.4Customizability 85.6Performance 61.4Productivity 91.0Portability 79.5![]() | 92 Overall/ Value 92.0Build Quality 85.6Customizability 92.4Performance 81.2Productivity 94.6Portability 79.2![]() | 69 Overall/ Value 68.6Build Quality 49.9Customizability 66.3Performance 94.1Productivity 82.5Portability 79.2![]() |
0.0 stars (0 reviews) | 4.5 stars (2 reviews) | 0.0 stars (0 reviews) |
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Name Jamesdonkey A3 | Name Keychron K2 Max | Name Yunzii RT75 |
Release year 2022 | Release year 2024 | Release year 2024 |
Switch Options Clicky, Linear, Tactile | Switch Options Linear, Tactile, Clicky | Switch Options Magnetic |
Profile Normal Profile | Profile Normal Profile | Profile Normal Profile |
Hot Swappable | Hot Swappable | Hot Swappable |
Layout Size 75% | Layout Size 75% | Layout Size 75% |
Layout Standard ANSI | Layout Standard ISO, ANSI, ISO-DE, ISO-UK, ISO-Nordic, ISO-SW | Layout Standard ANSI, JIS |
Layout Ergonomics Normal | Layout Ergonomics Normal | Layout Ergonomics Normal |
Knob Support | Knob Support | Knob Support |
Display Support | Display Support | Display Support |
Mac/Win Support | Mac/Win Support | Mac/Win Support |
Multi-Media Keys | Multi-Media Keys | Multi-Media Keys |
USB-C | USB-C | USB-C |
USB passthrough | USB passthrough | USB passthrough |
Connection Bluetooth, 2.4 GHz, Wired, Wireless | Connection Bluetooth, 2.4 GHz, Wired, Wireless | Connection Wired, Wired only, Bluetooth, 2.4 GHz, Wireless |
Polling Rate - | Polling Rate 1000 Hz | Polling Rate 1000 Hz;8000 Hz |
Battery capacity 3000 mAh | Battery capacity 4000 mAh | Battery capacity 4000 mAh |
Hall Effect Support | Hall Effect Support | Hall Effect Support |
QMK Support | QMK Support | QMK Support |
VIA Support | VIA Support | VIA Support |
VIAL Support | VIAL Support | VIAL Support |
N-Key Rollover | N-Key Rollover | N-Key Rollover |
Rapid Trigger | Rapid Trigger | Rapid Trigger |
Mount Style Gasket Mount | Mount Style PCB Mount | Mount Style Gasket Mount |
Screw in Stabilizers | Screw in Stabilizers | Screw in Stabilizers |
Sound Dampening | Sound Dampening | Sound Dampening |
Backlight Rgb | Backlight Rgb, South-face, White, White South-face | Backlight Rgb, South-face |
Case Colors | Case Colors | Case Colors |
Case Material ABS, Polycarbonate, Plastic, PBT | Case Material Aluminum, ABS | Case Material - |
Keycaps Material PBT | Keycaps Material PBT | Keycaps Material PBT |
Dimensions 40 x 136 x 321 mm | Dimensions 32 x 317 x 122 mm | Dimensions 42 x 334 x 144 mm |
Weight 1000g | Weight 940g | Weight 962g |
The Jamesdonkey A3 is a compact 75% mechanical keyboard kit designed for enthusiasts who want to build a customizable keyboard with their preferred switches and keycaps. It suits users looking for a versatile connection setup and a quieter, softer typing experience through gasket mounting and sound-absorbing materials. Its hot-swappable sockets make it easy to try different switches without soldering.