Nuphy Air75 V3 vs Melgeek O2

	Nuphy Air75 V3 – Full specification	Melgeek O2 – Full specification
Overview
Price	—	$129.00
Our Rating	9.0	9.2
Brand	nuphy	Melgeek
Category	Keyboard	Keyboard
Genral Info
Brand	Nuphy	Melgeek
Model Name	Air75 V3	O2
Series	Air Series	Low-Profile Series
Type	Low-profile Mechanical (Wireless + Wired)	Mechanical (Wireless + Wired + 2.4G)
Layout	75% (Compact)	75% (83 keys)
Release Year	2024	2025
Use Case	Work, Travel, Productivity	Work, Productivity, Mac-focused, Light Gaming
DESIGN & BUILD
Frame Material	Aluminum top + polycarbonate bottom	Polycarbonate (transparent shell)
Plate Material	Aluminum	Gasket mount
Keycap Material	Dye-sublimated PBT (low-profile)	PBT (Dye-sublimated)
Color Options	Basalt Black, Ionic White, Mist Blue	White
Dimensions (L × W × H)	316 × 132 × 16.5 mm	Compact low-profile (exact mm not specified)
Weight	600 g	650 g
Form Factor	Compact 75%	75% Low-profile
Finish	Anodized matte surface	Transparent, premium Mac-inspired
SWITCH & TYPING EXPERIENCE
Switch Type	Low-profile Mechanical (Hot-swappable)	Low-profile Mechanical (Hot-swappable)
Switch Options	Gateron Low-profile 2.0 Red / Brown / Blue	Kailh Sunlight (Linear, pre-lubed)
Mount Type	Gasket mount	Upgraded gasket mount with dampening layers
Stabilizers	Pre-lubed plate-mounted stabilizers	Pre-lubed
Number of Keys	—	83
Typing Angle	Adjustable with magnetic feet	Adjustable 3.5°–5° (magnetic TPU feet)
Key Rollover	Full N-key (wired) / 6-key (Bluetooth)	Full NKRO (wired)
Actuation Force	45 ± 5 g	Light, smooth (low-profile)
Key Travel	1.8 mm actuation / 3.2 mm total	Short low-profile travel
Typing Feel	Soft, snappy, precise feedback with low noise	Soft, quiet (45dB), fingertip contour
PERFORMANCE
Response Time (Bluetooth)	~8–10 ms	Ultra-low latency (2.4G)
Response Time (Bluetooth)	~8–10 ms	Ultra-low latency (2.4G)
Anti-Ghosting	100% NKRO	100%
Input Lag	Very low (Gaming Mode)	Negligible (1000Hz)
Latency Mode	Low-latency switch mode	Gaming / Power Saving modes
RGB & LIGHTING
Backlight Type	Per-key RGB	Per-key RGB + side ambient
LED Orientation	South-facing	South-facing
Lighting Effects	20+ preset modes	Multiple modes
Custom Effects	Supported (via VIA/NuPhy Console)	Via Hive software
Brightness Levels	5-step adjustable	Adjustable
Control	Software + Function shortcuts	Software + FN shortcuts
SOFTWARE & CUSTOMIZATION
Firmware	VIA / QMK compatible (open-source)	Melgeek Hive
Key Remapping	Fully programmable	Supported
Macro Support	Yes	Yes
Profile Storage	3 onboard profiles	Multiple profiles
Firmware Update	Supported via USB-C	Via USB-C
Hotkey Shortcuts	Lighting, media, OS switch	FN+1–8 device switch, RGB, modes
SOUND & COMFORT
Acoustic Dampening	Silicone pad + foam layer	Multiple foam & silicone layers
Typing Sound Profile	Muted, crisp low-profile sound	Quiet thock (~45dB)
Gasket Mount	—	Enhanced gasket feel
Noise Reduction	Optimized construction and dampers	High (office-friendly)
Wrist Rest	Optional accessory	No
Tilt Feet	2-level magnetic tilt risers	Magnetic adjustable TPU
Support and compatibility
Software Support	macOS, Windows, Linux, iOS, Android	macOS, Windows, Linux, iOS, Android
Supported OS	—	Cross-platform (Mac native)
Plug-and-Play	Yes	Yes
Layout Options	macOS / Windows keycaps included	Mac / Windows switchable
BATTERY & CONNECTIVITY
Battery Capacity	4000 mAh	2500 mAh
Battery Type	Rechargeable lithium-ion	Lithium
Battery Life (No RGB)	Up to 250 hours	Up to 13 months / 3000+ hours (BT)
Battery Life (RGB On)	70–90 hours	~40 hours (RGB on)
Charging Port	USB Type-C	USB Type-C
Charge Time	Approx. 3 hours	Not specified
Wireless Mode	Bluetooth 5.1	Bluetooth 5.1 + 2.4G
Wired Mode	USB-C	USB-C
Multi-Device Pairing	Yes, up to 3 devices	Up to 8 devices
Switch Between Devices	Fn + 1/2/3	FN + 1–8
Polling Rate (Wired)	1000 Hz	1000 Hz (2.4G)
Polling Rate (Wireless)	125 Hz	Lower (Bluetooth)