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- USA
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Description
ZB4BW31Main Range of product Harmony XB4 Product or component type Head for illuminated push button Device short name ZB4 Product compatibility BA 9s Bezel material Chromium plated metal Head type Standard Mounting diameter 22 mm Sale per indivisible quantity 1 Shape of signaling unit head Round Type of operator Spring return Operator profile White flush, unmarked Operator additional information With plain lens Complementary CAD overall width 29 mm CAD
Main
| Range of product | Harmony XB4 |
| Product or component type | Head for illuminated push-button |
| Device short name | ZB4 |
| Product compatibility | BA 9s |
| Bezel material | Chromium plated metal |
| Head type | Standard |
| Mounting diameter | 22 mm |
| Sale per indivisible quantity | 1 |
| Shape of signaling unit head | Round |
| Type of operator | Spring return |
| Operator profile | White flush, unmarked |
| Operator additional information | With plain lens |
Complementary
| CAD overall width | 29 mm |
| CAD overall height | 29 mm |
| CAD overall depth | 32 mm |
| Net weight | 0.027 kg |
| Resistance to high pressure washer | 7000000 Pa at 55 °C, distance : 0.1 m |
| Mechanical durability | 10000000 cycles |
| Electrical composition code | M7 for <6 contacts using single blocks in front mounting with BA 9s M8 for <6 contacts using single and double blocks in front mounting with BA 9s M9 for <2 contacts using single blocks in front mounting with BA 9s and transformer |
| Device presentation | Basic sub-assemblies |
Environment
| Protective treatment | TH |
| Ambient air temperature for storage | -40…70 °C |
| Ambient air temperature for operation | -40…55 °C |
| Overvoltage category | Class I conforming to IEC 60536 |
| IP degree of protection | IP66 conforming to IEC 60529 IP67 IP69 IP69K |
| NEMA degree of protection | NEMA 13 NEMA 4X |
| IK degree of protection | IK06 conforming to EN 50102 |
| Standards | CSA C22.2 No 14 JIS C8201-5-1 UL 508 EN/IEC 60947-1 EN/IEC 60947-5-1 EN/IEC 60947-5-5 EN/IEC 60947-5-4 JIS C8201-1 |
| Product certifications | GL UL listed RINA DNV CSA LROS (Lloyds register of shipping) BV |
| Vibration resistance | 5 gn (f= 2…500 Hz) conforming to IEC 60068-2-6 |
| Shock resistance | 30 gn (duration = 18 ms) for half sine wave acceleration conforming to IEC 60068-2-27 50 gn (duration = 11 ms) for half sine wave acceleration conforming to IEC 60068-2-27 |
Offer Sustainability
| Sustainable offer status | Green Premium product |
| REACh Regulation | REACh Declaration |
| EU RoHS Directive | Pro-active compliance (Product out of EU RoHS legal scope) EU RoHS Declaration |
| Mercury free | Yes |
| RoHS exemption information | Yes |
| China RoHS Regulation | China RoHS declaration |
| Environmental Disclosure | Product Environmental Profile |
| Circularity Profile | End of Life Information |
Contractual warranty
| Warranty | 18 months |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 1528 reviews
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Product Reviews
★★★★★ 5
Such a pretty bottle and it feels so great on skin!
Size: 1.7 Fl Oz (Pack of 1), Size: 1.7 Fl Oz (Pack of 1)
I was so excited to try this serum, and honestly, it did not disappoint. What first caught my eye was the packaging—I’m a sucker for pretty bottles, and this one is stunning with its shimmery, rainbow-like colors. Even the serum itself has a subtle shimmer that matches the bottle, which I absolutely love.
The scent was the first thing I noticed. It has a light floral smell with a hint of honey, almost like a soft version of the old Sweet Pea scent from Bath & Body Works. It’s not overpowering at all. You only really smell it when dispensing or applying it—once it’s on your skin, the scent completely disappears. No headaches, no lingering fragrance.
Application-wise, this serum is silky smooth and spreads beautifully. It made me realize my skin wasn’t as soft as I thought—because after using this, my skin felt noticeably softer, hydrated, and plump. It absorbs well and leaves my skin feeling nourished without being greasy.
It does contain retinol, so the warnings about avoiding the eye area and limiting sun exposure are important. I’ll definitely be pairing this with a good hydrating sunscreen, especially during daytime use. I plan to ease into it by using it once or twice a week until my skin fully adjusts.
Overall, I love everything about this serum—the packaging, the light scent, the texture, and the results. My skin feels smooth, hydrated, and healthy. This is definitely a product I’m excited to keep using and would happily recommend.
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Reviewed in the United States on January 11, 2026
★★★★★ 5
The best serum!
Size: 1 Fl Oz (Pack of 1)
This is the best face serum, and the price is unbeatable. It makes my face feel silky smooth and hydrated for the whole day. I will not use anything else.
Plus, it smells good. Highly recommend!
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Smells great and silky smooth
Size: 1 Fl Oz (Pack of 1)
⭐️⭐️⭐️⭐️⭐️
I’ve been using the Olay Super Serum for a few weeks now and I’m honestly impressed with how much it does in one step. My skin looks noticeably brighter and more even, and it feels super hydrated without being greasy or heavy. It absorbs quickly, which I love because I can layer moisturizer and makeup right after without any pilling.
The texture is silky and lightweight, and a little goes a long way. I’ve also noticed my skin feels smoother and a bit firmer, especially around my cheeks. It gives a really nice healthy glow that looks natural, not shiny.
If I had to mention one small thing, it’s that you need to use sunscreen during the day since it contains AHA — but that’s expected with brightening products anyway.
Overall, this is a great all-in-one serum if you want brighter, smoother, more hydrated skin without using a bunch of separate products. I’d definitely repurchase and recommend it for anyone looking to simplify their skincare routine while still getting real results.
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Reviewed in the United States on March 2, 2026
★★★★★ 4
Yes
Size: 1.7 Fl Oz (Pack of 1)
Happy with this purchase
Very light on face , scent is light and fresh
Leaves my skin soft , hydrated and moisturized
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Miraculous and so inexpensive!
Size: 1.7 Fl Oz (Pack of 1)
This stuff is amazing! I am getting benefits I never dreamed…I have only had it 3 days but had to report my immediate results!
I have a patch of seborrhea on my left eyelid that is an annoyance daily. I tried this serum on my eye and no burning or stinging. No irritation at all! I put my makeup on and thought little more of it. At the end of the day, no dry flaky patch or makeup issues there at all! No eye itching or irritation all day! This is something I thought I just had to live with.
As for the general serum I think the lines around my eyes are less prominent and my skin feels soft and moisturized.
And last I love the large bottle! Great value! And I am not embarrassed to have the bottle sitting on my sink…
Overall I think it is liquid gold for a bargain price! Will definitely buy again. Truly unexpected miracle in a bottle!
Highly recommend.
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Reviewed in the United States on January 22, 2026