Compact keypads · OSRS key maps
The O3C is a wired three-key Hall-effect pad with a knob and display. The EK21 is a 20-key mechanical numpad with a knob, VIA remapping, and wired or wireless connections.
Choose the O3C if you need only a few inputs in a very compact wired pad. Choose the EK21 if you want a broader 20-key layout, layers, or 2.4 GHz and Bluetooth options. Neither keypad is approved by Jagex as a specific OSRS device.
The O3C is a small three-key control pad. The EK21 gives you a full numpad-sized group of mechanical keys and multiple connection modes.
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Choose it if: You want three Hall-effect keys, a multifunction knob, and a wired pad that takes little desk space.
Tradeoff: Three keys cannot replace a full keyboard or a 20-key numpad. It is USB-C wired.
Check the SayoDevice O3C on Amazon
Choose it if: You want 20 mechanical keys, a knob, VIA layers, and the choice of 2.4 GHz, Bluetooth, or USB-C.
Tradeoff: It takes more desk space than the O3C and does not have Hall-effect actuation.
Check the EPOMAKER EK21 VIA on AmazonFeatures that change the key map, movement, or connection options.
| Feature | SayoDevice O3C | EPOMAKER EK21 VIA |
|---|---|---|
| Keys and controls | 3 Hall-effect keys, knob, and display | 20 mechanical keys and 1 knob |
| Switch type | Magnetic Hall-effect | Hot-swappable mechanical switches |
| Connection | USB-C wired | 2.4 GHz wireless, Bluetooth, or USB-C wired |
| Configuration | SayoDevice web configurator | VIA programmable |
| Form factor | Mini keypad | 20% numpad, gasket-mounted |
The O3C can hold a small set of direct key assignments beside a regular keyboard. The EK21 gives you more keys for a larger map, such as Inventory, Prayer, Spellbook, modifiers, and other individually assigned inputs. Keep each press tied to a direct action.
Jagex’s rules do not pre-approve a keypad or a particular remapping. Do not treat a one-switch-to-mouse-click setup as certified, and do not use macros or repeat functions to automate play. Read the OSRS one-to-one input and macro-rules guide before configuring remaps.
For a larger OSRS map on the EK21, reserve a base layer for direct F-key and modifier assignments, then use a separate layer only for ordinary number entry when banking. The O3C is easier to place beside a standard keyboard when only a few controls need dedicated keys.
For desktop Albion, compare these only if your regular keyboard map already works and you want more physical key positions. The O3C offers three keys; the EK21 offers 20. This hardware comparison does not establish support for a particular game mode or remapping.
Its three keys and knob suit a short list of controls. If you need five F-keys plus modifiers and menu keys, the EK21 offers more physical keys and layers.
Use it wired, with its 2.4 GHz receiver, or over Bluetooth. The O3C stays wired and uses SayoDevice’s configurator for its controls.
You give up a large key grid and wireless use. Three keys and one knob offer fewer direct key positions than the EK21.
You give up the O3C’s Hall-effect switches and very small footprint. It is a mechanical numpad, and its 20 keys still do not cover every job of a full-size keyboard without layers.
Neither keypad makes a remapping automatically acceptable under Jagex’s rules. Both need deliberate configuration, and the O3C’s small size or the EK21’s extra keys do not change what an input sends. If a mapping automates play or its status is unclear, leave it unused.
No. It has three keys and a knob, so it can handle only a short list of assigned controls. The EK21 gives you 20 keys and layers for a broader map, though it still has fewer positions than a full keyboard and requires a separate layout for typing.
Yes. EPOMAKER lists 2.4 GHz wireless, Bluetooth, and USB-C wired modes. Use the wired connection when you want to avoid a receiver or battery, or choose one of the wireless modes when moving the pad or clearing cables matters more.
Jagex does not publish approval for this specific keypad. Its rules cover prohibited hardware or software behavior, so check the current rules and avoid macros or features that automate play. A one-key remap is not a product certification; if you are unsure about a mapping, do not use it.
No. EPOMAKER lists hot-swappable mechanical switches, while the O3C uses Hall-effect switches. The EK21 also has a gasket-mounted plate and VIA configuration. Those features give it a different layout and switch system, not the O3C’s adjustable magnetic sensing. That magnetic sensing belongs only to the O3C in this comparison.
The EK21 has 20 keys plus a knob, so it offers more direct key positions for F-keys, modifiers, and menus. The O3C is the smaller choice when three keys and a knob cover the controls you need. Keep any remapping within Jagex’s current rules.