Track order
Free support
Exclusive discounts
Secure payments
Couldn't load pickup availability
Not sure which device fits your project? Our team speaks KNX. Contact us for a free technical recommendation.
Got questions?
Feel free to get in touch
Ask an expert!
The Eelectron BK04FX-0724 is the 4-button kit in FENIX Grigio Londra 0724 for the OL-U KNX switch SO08A01KNX (8 buttons, 16 channels, RGB swipe bar, thermostat). SO08A01KNX ships as bare hardware; the key set, a PO71 cover frame and an FO71A01 metal frame are ordered separately to suit the interior. This layout gives four full-width buttons, each key backed by its own RGB LED and freely programmable in ETS.
The finish is FENIX NTM® Grigio Londra 0724 (a mid-tone matte London grey): the FENIX NTM® nanotech laminate of the OL-U FENIX Edition — very low light reflectivity, soft-touch matte, anti-fingerprint — specified for hospitality and high-end residential work. Pair it with the PO71 FENIX frame in the same colour code.
| Type | Key set (button kit) for OL-U KNX wall devices |
| Keys / layout | 4 keys: 4 full-width buttons |
| Finish / colour | FENIX NTM® Grigio Londra 0724 (a mid-tone matte London grey) |
| Material | FENIX NTM® matte laminate |
| Compatible hardware | SO08A01KNX |
| Compatible cover frames | PO71A01xx, PO71A03xx, PO71A71 / A55 / A45 / A60 doubles |
| Device footprint | 71 x 71 mm (2.80 x 2.80 in) OL-U front |
| Weight (net, packed) | 0.13 kg (0.29 lb) |
| Manufacturer part no. / GTIN | BK04FX-0724 / 8054144523798 |
Fits SO08A01KNX. Other layouts in this colour: BK08FX-0724, BK24FX-0724, BK42FX-0724. Other FENIX colours: BK04FX-0030, BK04FX-0032, BK04FX-0720, BK04FX-0748, BK04FX-0754. Matching frames: PO71A01FX-0724, PO71A03FX-0724, PO71A71FX-0724. Mounting frames FO71A01-2M / -3M.
Passive accessory – no electrical rating. The OL-U KNX hardware it mounts on is CE certified; not UL/NRTL listed — verify local code requirements before specifying in US installations.
Datasheet (PDF) · Available to order.
Orders over $500 ship free within the USA (under 50 lbs). Orders under $500 carry a low cost shipping fee.
Most in-stock orders ship within 1–2 business days from Miami, FL. Delivery typically takes 3–5 business days depending on destination.
For freight or oversized orders, our team will contact you with a custom quote.
All KNXSupply products are covered by the manufacturer's warranty, ranging from 1 to 3 years depending on the brand. Warranty terms are fulfilled directly by the manufacturer.
If you experience any issue, contact us and we'll coordinate the claim process on your behalf.