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Ships within 48 hours · Estimated delivery Jun 29 - Jul 4
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Description
amp booster box Crankk / Helium HNT Amplifier Booster EU 868/ US 915 MHzOur bidirectional Crankk Helium booster ensures stronger and improved signal quality in the EU 868 MHz (US 915 MHz) frequency range. This significantly increases the potential witness rate and, in turn, boosts earnings. Easy installation with simple plug & play Built in SAW filter enhances the received signal by up to 400% Choose your miner and get the right adapter for free! Is your miner indoors and your antenna indoors or outdoors? Then this
Our bidirectional Crankk/Helium booster ensures stronger and improved signal quality in the EU 868 MHz (US 915 MHz) frequency range. This significantly increases the potential witness rate and, in turn, boosts earnings.
✅ Easy installation with simple plug & play
✅ Built-in SAW filter enhances the received signal by up to 400%
Choose your miner and get the right adapter for free!
- Is your miner indoors and your antenna indoors or outdoors? Then this product is perfect for you. The indoor amplifier is installed directly on the miner.
- Is your miner outdoors and your antenna indoors or outdoors? Then the outdoor amplifier is the right choice. It is installed directly on the antenna.
💬 Have questions about the product? Feel free to contact us—we’re happy to help!
📄 Product Datasheet – EU 868 MHz
📄 Product Datasheet – US 915 MHz
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
4.5 ★★★★★
Based on 916 reviews
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Product Reviews
★★★★★ 5
It works as expected
Size: 8.3" x 9.3" x 1.3"
Great. It does block air flow by a bit, but it is ok, if you don't need strong air blowing your face at maximum setting all the time.
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Reviewed in the United States on June 14, 2025
★★★★★ 5
Great cabin filter for 2019 Acura RDX
Size: 8.3" x 9.3" x 1.3"
When I have my car serviced at the Acura dealership, they routinely recommend that the cabin filter be replaced. As we all know, a dealership is going to charge an arm and a leg for a basic service. Therefore, I have been replacing the cabin air filter myself for the past few years. I like BOSCH products and when I found this filter on Amazon, I knew that was the one to purchase for my 2019 Acura RDX. The filter fits perfectly in its location in the glove box. It literally takes less than five minutes to swap out the old filter for the new. I will continue to use this product while I have the RDX.
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Reviewed in the United States on November 30, 2025
★★★★★ 5
Perfect fit, easy installation.
Size: 8.3" x 9.3" x 1.3"
This part fits perfectly. Directional flow is printed on the part however you need to confirm which way air flows in the actual air box. The easiest test is to run the a/c with the filter out, wet a finger, and stick in in the air box to see which side the air blows cold. Then just install this part in the air flow direction as printed on the part. I have not noticed a difference in air quality yet, however I imagine being a HEPA filter, this will do wonders keeping pollen out of the car. Installed this in a 2011 Honda CR-Z. Easy installation. Part looks high quality which is fitting for Bosch.
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Reviewed in the United States on May 26, 2026
★★★★★ 4
Great filter, but doesn't fit 2013 Honda Fit without modification
Size: 8.3" x 9.3" x 1.3"
Right off the bat: I don't have any airflow problems with this filter. It works great, the air is noticeably cleaner, and airflow has not been meaningfully reduced. However, it doesn't fit my air filter holder very well.
The ' air filter holder' (a plastic tray that slides horizontally into the air flow system) has two plastic fringes on either side of the tray, which each have two small notches in them, a few inches apart from one another. This appears to act as a sort of 'key' by which you can gauge you are putting the filter in with the correct alignment. On an OEM filter, the slots line up with two strips of material that stretch across the length of the filter, which themselves rest within the slots. However, the slots don't line up with the strips on this filter. I had to cut the fringes so that the slots in them are wider, so the strips would fit in them. Without doing this, the filter wouldn't press down into the tray.
Having done that, and the filter now rests flush in the tray, there are still marginal gaps around the perimeter of the filter. It's a millimeter or two too small for the tray, so there is some airflow around the filter. This could be rectified by wrapping insulation tape or something around the edge of the filter, or could be ignored if you're not super picky. I haven't added any wrapping to get an airtight seal, and even with that gap I still noticed that the air is way better.
So ultimately, it didn't fit exactly, but it fits 90% of the way and, with some finagling, is a superior filter by any other measure.
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Reviewed in the United States on December 3, 2018
★★★★★ 5
Don't overlook this important bit of maintenance
Size: 8.3" x 9.3" x 1.3"
Cabin air filters get dirty and gross quicker than you realize. I recommend changing them twice a year. Bosch is a quality brand, very happy with it.
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Reviewed in the United States on March 8, 2026