# Razer BlackWidow V4 Low-profile TKL HyperSpeed JP: Who It Suits and What to Check > Low-profile TKL, 18.5mm front height, 1.2mm/40g linear switches, 2.4GHz + Bluetooth, up to 980h battery (RGB off). JIS layout notes. Tags: keyboard, razer, blackwidow-v4, low-profile, tenkeyless, wireless, japanese-layout, bluetooth Source: https://www.amazon.co.jp/dp/B0FMY9QT69 Article page: https://web-autoai.com/articles/razer-blackwidow-v4-low-profile-tenkeyless-hyperspeed-jp?lang=en Prices and ratings change over time — check the article page for the current values. --- This article covers the Razer BlackWidow V4 Low-profile Tenkeyless HyperSpeed JP Yellow Linear Switch Wireless Gaming Keyboard with Aluminum Top Case, Japanese Layout. It explains how the spec numbers translate into real-world use and makes clear who this keyboard is and is not for. ## Overview The Razer BlackWidow V4 Low-profile Tenkeyless HyperSpeed JP is Razer's low-profile, tenkeyless wireless gaming keyboard. In short, it suits people who want four things in one board: a slim profile, wireless connectivity, a Japanese (JIS) layout, and a tenkeyless footprint. It is not for people who want to swap switches or fine-tune actuation with features like rapid trigger. It uses Razer's own Low-profile Yellow Linear switches, with a light 40g actuation force and a shallow 1.2mm actuation point. As linear switches, they have no tactile bump or click, so they are quieter than clicky switches. The front height is 18.5mm, and the top case is 5052 aluminum alloy for a premium look and a stiff chassis. It connects over Razer HyperSpeed Wireless (2.4GHz) or Bluetooth 5.0, and Razer rates the battery at up to 980 hours with RGB off. Despite being tenkeyless, it has 11 dedicated control buttons, giving it controls close to those of a full-size board. ## Reading the Specs | Item | Value | What it means in practice | |---|---|---| | Key Switch | Razer Low-profile Yellow Linear (mechanical) | Smooth, linear keystrokes with modest noise | | Actuation Point | 1.2mm | Registers early, good for fast repeated inputs | | Actuation Force | 40g | Light; resting fingers can trigger keys by accident | | Front Height | 18.5mm | Low front edge, less wrist extension | | Dimensions (W×D×H) | 357×161×25mm | Tallest point is 25mm; 18.5mm is the front | | Keycaps | Double-shot PBT (textured) | Legends last; resists shine | | Backlight | RGB (Chroma) | Lighting shortens battery life | | Connectivity | HyperSpeed Wireless (2.4GHz) / Bluetooth 5.0 | 2.4GHz for games, Bluetooth for secondary devices | | Battery Life | Up to 980 hours (RGB off) | Check the product page for RGB-on runtime | | Supported OS | Windows 10 and later / macOS | Advanced settings depend on software support | | Layout | Japanese (JIS), tenkeyless | Not a US ANSI layout | | Top Case Material | 5052 aluminum alloy | Rigid, with a premium finish | The height figure is the easiest one to misread. The product name says ultra-thin 18.5mm, but that is the front edge. The listed dimensions are 357×161×25mm, so the tallest point is 25mm. If you plan to store it in a keyboard tray or under-desk drawer, measure for 25mm. The second key point is the combination of force and actuation depth. At 40g and 1.2mm the switches are light and shallow, which makes WASD movement and ability spam easy on the fingers and feel responsive. The downside is that if you rest your fingers on the keys, stray inputs happen more often. Coming from heavier switches, expect a few days of adjustment. ## Compatibility Guide For 2.4GHz, you plug the included USB-A HyperSpeed Wireless dongle into your PC. It is the low-latency, stable option and the one to use for gaming. As a general rule, 2.4GHz links are most stable when the dongle is close to the keyboard, and rear USB 3.0 ports are known to cause interference. If you notice dropouts, the usual fix is to bring the dongle onto the desk with an extension cable. Check the product page to see what form the included USB dongle adapter takes. Bluetooth 5.0 pairs with up to three devices, and you can switch between a PC, tablet, and phone with one button. Bluetooth tends to add more latency than 2.4GHz, so a sensible split is 2.4GHz for gaming and Bluetooth for typing on other devices. HyperSpeed Multi-Device support also lets a compatible Razer mouse share the same dongle, freeing up a USB port. Supported operating systems are Windows 10 and later and macOS. Key remapping and lighting are handled in Razer Synapse, but macOS may not get every Synapse feature. If you want deep customization on a Mac, check Razer's official macOS support status first. Because this is a JIS layout, some keycap legends may also not match what the keys do on a Mac, such as the positions of command and option. Console support is not listed in the spec data, so do not buy it assuming it will work there. Physically, the 357×161mm tenkeyless footprint leaves more room for mouse movement than a board with a numpad. It charges over USB-C, and a USB-A to C cable is included. The spec data does not say whether it can work as a wired keyboard while the cable is connected, so check the product page if that matters to you. ## Product Info rmation On Amazon. co. The price was essentially flat over that period, but sales and stock changes can move it, so check the listing before you buy. Treat the rating as a rough signal, and for subjective things like switch feel, compare the specs against your own preferences. This is a fairly recent model, released in 2025, positioned in the upper-mid range. Its 11 dedicated controls include a multi-function roller, media keys, a battery status button, and an AI prompt button. Adjusting volume or media without leaving the keyboard mid-game is an unusual advantage for a tenkeyless board. It comes with Razer's standard 2-year warranty through the official Japanese distributor. In the box: the keyboard, a USB-A HyperSpeed Wireless dongle, a USB-A to C cable, a USB dongle adapter, a Razer logo sticker, and a user manual. If you are comparing it with a parallel import, whether domestic warranty service applies is worth weighing. ## Comparison with Competitors | Product | Form | Switch | Layout | Why pick it | |---|---|---|---|---| | Razer BlackWidow V4 Low-profile TKL HyperSpeed JP | Tenkeyless, low-profile | Low-profile mechanical (linear) | JIS | Slim, wireless, JIS, and TKL in one board | | Logicool G915 X LIGHTSPEED | Full-size, low-profile | Low-profile mechanical (linear red) | JIS | Low-profile with a numpad | | CORSAIR K100 AIR | Full-size, ultra-thin | CHERRY MX low-profile | No kana legends | Thinness first, no kana needed | | Keychron K10 HE | Full-size | Magnetic switches | US | Adjustable magnetic-switch features | In this price range, low-profile wireless boards narrow down quickly by numpad and layout. If you want a tenkeyless, JIS, low-profile mechanical board, this is one of the few that fits exactly. If you type a lot of numbers and need a numpad, a full-size low-profile model like the Logicool G915 X LIGHTSPEED is the more natural choice. If competitive performance is your top priority, magnetic (Hall effect) switch boards are also worth a look. Many of them offer adjustable actuation and rapid trigger. The spec data for this Razer lists no rapid trigger, and its actuation point is fixed at 1.2mm. Players who care about inputs cutting off the instant a key is released should consider those boards instead. ## What Matters in Daily Use Low-profile switches have shorter total travel than standard mechanical switches, so keys bottom out sooner. Once you adapt, typing gets faster, but if you are used to standard mechanical boards, it will feel shallow and light at first. That is a difference in character rather than a flaw, and trying any low-profile keyboard in a store will tell you quickly whether it suits you. Textured double-shot PBT keycaps resist shine and legend wear over years of use. Some low-profile boards cut costs with ABS caps, so this is a reasonable spec at this price. The aluminum top case also does more than look good: it helps keep the board from flexing. The 980-hour figure is with RGB off. With lighting on all the time, battery life will be much shorter, and the RGB-on runtime is not in the spec data. If you use the lighting, plan on charging every few days to few weeks. ## Recommended Users - **Tenkeyless FPS/TPS players**: More room for mouse sweeps, and light 40g linear switches make repeated inputs easy. The 18.5mm front height also reduces wrist strain. - **Anyone looking for a low-profile mechanical board in JIS**: Many low-profile wireless boards are US layout or have no kana legends. If you are used to the JIS key arrangement, this is a rare option. - **Multi-device users**: Bluetooth pairs with up to three devices, so you can move between a desktop, a laptop, and a tablet with one button. - **People who want a quieter board**: Linear switches with no click are easier on the people around you than clicky switches. - **Minimal desk setups**: Wireless plus tenkeyless means fewer cables and less clutter, and the aluminum top case looks sharp. ## Before You Buy First, this is a tenkeyless board. If you do a lot of numeric entry, such as accounting or data input, you will need a separate numpad or a full-size model. Also, 18.5mm is the front height; the tallest point is 25mm. Use 25mm when checking storage space. The switches are soldered to the PCB and cannot be swapped by the user. If you want to change the feel by swapping switches, pick a hot-swappable board. The keycaps are low-profile specific, and standard MX-compatible keycaps may not fit. Check compatibility before planning a keycap swap. The 980-hour battery figure is with RGB off; full RGB shortens it considerably. Charging is over USB-C, but fast charging is not supported. The dongle is USB-A, so a USB-C-only laptop needs an adapter or hub. Software needs checking too. Remapping, macros, and lighting are set in Razer Synapse, and macOS may not offer the same options. Mac-first users should check Razer's official macOS support. The spec data lists no rapid trigger, so competitive players who want adjustable actuation are better served by magnetic-switch boards. Prices are snapshots from the capture date. Before buying, confirm the current price and stock, and check that the listing images and title show the Japanese (JP) layout model. It is easy to mix it up with similarly named US-layout or full-size versions. ## FAQ **Q. Is the body really 18.5mm thick? ** A. 18.5mm is the front edge height. The dimensions are 357×161×25mm, so the tallest point is 25mm. **Q. Is Bluetooth fine for gaming? ** A. Bluetooth tends to add more latency than 2.4GHz, so use the included HyperSpeed Wireless (2.4GHz) dongle for gaming. Bluetooth is best for switching between up to three devices. **Q. Does it work on a Mac? ** A. macOS is supported for typing. However, JIS keycap legends may not match key behavior on a Mac, and Razer Synapse settings may differ from Windows. **Q. Can I swap the switches? ** A. No. The switches are soldered. Choose a hot-swappable board if you want that. **Q. How long does the battery last? ** A. Up to 980 hours with RGB off. Lighting shortens this considerably, and the RGB-on figure is not in the spec data, so check the product page. ### Product Disclosure (Amazon) - Manufacturer: Razer(レイザー) - Seller: Amazon.co.jp - Fulfilled by: Amazon.co.jp - ASIN: B0FMY9QT69 - Note: This article covers a manufacturer-made product based on Amazon listing details.