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The OP1w 4k v2 combines the PixArt PAW3950 sensor, up to 4000Hz wireless polling, and Kailh GX mechanical switches for precise, responsive performance. Hot-swappable switches and a dustproof Kailh encoder provide enhanced customization and durability, making it an ideal choice for competitive gaming.

OP1w 4k v2 - Where performance meets perfection
Introducing the OP1w 4k v2, our newest cutting-edge wireless gaming mouse, engineered for the ultimate competitive edge. Powered by a Nordic wireless MCU, OP1w 4k v2 achieves a blazing-fast 4000Hz wireless polling rate, delivering extremely low click and motion latency.
The OP1w 4k v2 is equipped with a Pixart PAW3395 sensor for pixel-perfect tracking as well as our exclusive Kailh GX SPDT switches with GX Mode compatibility, delivering crisp and super satisfying clicks. As with all OP1 series models, the OP1w 4k v2 features swappable main button switches for customizable click experience and feel. OP1w 4k v2: where performance meets perfection.

Wireless Polling Rate of up to 4000Hz
To achieve the best performance possible, OP1w 4k v2 is powered by the Nordic nRF52840 wireless MCU. The 4k dongle utilizes a Nordic nRF52820 to guarantee stable and reliable wireless data transmissions. Additionally, a Nuvoton M483 MCU is used for the high-speed USB connection, enabling high wireless polling rates of up to 4000Hz for incredibly low sensor and click latency. The 4k dongle is included with the mouse for ideal performance straight out of the box.

Custom PixArt PAW3950 U+1F95A
Unlock ultimate precision and lightning-fast response with our custom PixArt PAW3950 U+1F95A sensor in the OP1w 4k v2. With up to 30,000 CPI max resolution, 750 IPS, and 50G acceleration, every movement is captured with raw accuracy and maximum impact. Fine-tune your setup with 11 Lift-Off-Distance steps from 0.7 to 1.7mm, and precise 10-point CPI adjustments below 10,000 CPI for complete control. No smoothing, no angle-snapping — just pure, uncompromised performance. Motion-Sync delivers consistently timed reports at polling rates up to 4000Hz, sharpening your muscle memory and perfecting competitive gameplay.

Kailh GX Switches developed by Endgame Gear
Designed for lightning-fast precision at all polling rates, the mechanical Kailh GX switches guarantee you won't miss a crucial click. Their SPDT configuration ensures optimal electrical contact and unmatched reliability. Featuring both top and bottom contacts, Kailh GX Switches excel whether you prefer low click latency in GX Speed Mode or security in GX Safe Mode. What sets them apart is their crisp, defined click sensation, offering tactile feedback for enhanced gaming control. Precise actuation and a balanced design ensure flawless, spam-friendly rapid-fire actions.

Industry-Leading Latency
The OP1w 4k v2 delivers exceptional wireless responsiveness, with click latency averaging below 310 microseconds* and motion latency under 400 microseconds**. A stable 4000Hz click polling rate ensures fast, consistent input registration across all sensor polling rate settings, while GX Speed Mode further reduces click latency for maximum competitive performance.
* Tested with 10,000 clicks on XLAT v.1.4.0
** Tested with 10,000 motion data points on XLAT v.1.4.0

Redesigned Shape for Versatile Claw Grip
The OP1w 4k v2 gaming mouse offers unparalleled comfort during those intense gaming sessions, allowing you to focus on your performance. Drawing inspiration from the popular XM shape, the OP1w 4k v2 takes it up a notch while keeping an emphasis on claw grips. Its flatter sides provide ultimate flexibility for finger placement, making it an excellent fit even for gamers with larger hands. The extended side walls prevent accidental clicks, allowing you to rest your fingers on the edge without any interruptions. This subtle yet significant design change offers additional comfort and control, catering to gamers with various hand sizes and grip styles.

Swappable Main Button Switches with Optional Switch Packs
What makes a mouse click great? Ask this question to 10 people and get 11 different answers. Everyone has their own preferences and sometimes we just want to use what nobody else is using. While the Kailh GX is a switch with a very good combination of short internal travel, crisp actuation point and spammability, you may still want to try your favourite switch. All OP1 mice have a swappable main button switch design with accessible screws at the bottom plate. This allows for effortless customization, giving you the perfect click feel tailored to your liking. Choose from a variety of switch packs offering different click sensations, and follow our simple step-by-step guide to replace the switches. With the universal switch pack, you can use any mechanical switch you can find, solder-free.

Prioritizing Performance
We've engineered our wireless technology to prioritize performance over anything else. By running the sensor in permanent Corded Mode and minimal power-saving on the Nordic 58240 MCU, we ensure unrivaled responsiveness for your gaming experience. To balance the demands of high performance and extended battery life, the sensor switches to power-saving mode after 1 minute of inactivity, transitioning into Deep Sleep mode after 3 minutes. Users can easily customize these settings to tailor their gaming preferences and also disabling Power Saving and Deep Sleep altogether. With the default settings, the OP1w 4k v2 delivers approximately 30 hours of battery life at a 4000Hz polling rate, empowering gamers with uninterrupted playtime at peak performance.
Technical Specifications
PixArt PAW3950 U+1F95A
steps of 10 CPI ≤10000 CPI, 50 CP >10000 CPI; pre-defined: 400, 800 (default), 1600, 3200
1000 Hz, 2000 Hz, 4000 Hz (4000 Hz by default)
59.5g
750 IPS
50 G
pre-sorted Kailh GX switches
80 Million Actuations
wired (USB 2.0 Type A)
~118.2 x 60.5 x 37.2mm (L x W x H)
0.7 - 1.7mm in increments of 0.1mm via software
Nordic nRF52840
digital (adjustable via software)
5 + 2 (2x top, 2x side, 1x mouse wheel, 1x CPI on bottom, 1x power slider on bottom)
Kailh Dustproof
2-way
pre-sorted Kailh GM 2.0 switches (20 million actuations)
pre-sorted Kailh GM 2.0 switches (20 million actuations)
Plastic (Chassis), PTFE (Skates), Dry Grip Coating (Surface)
Hybrid Skate Design (small skates pre-installed, big skates included in the box)
Black Flex Cord 5.0 (180cm, USB 2.0)

