[Chance for a Full Refund!] Pre-sale Starts April 3 (Fri) at 9 AM on CAMPFIRE: The Magic That Transforms 'Listening While Aware' | 'Bone Conduction x Air Conduction' Dual Driver Earphones
The 'OpenDual' dual-driver earphones, combining bone and air conduction, have launched for pre-sale on CAMPFIRE. They feature IPX8 waterproofing and 32GB of internal storage, with a full refund lottery campaign running from April 27 to 30 for those who meet specific conditions.
π Article Processing Timeline
- π° Published: April 28, 2026 at 00:59
- π Collected: April 27, 2026 at 16:31
- π€ AI Analyzed: April 27, 2026 at 17:33 (1h 1m after Collected)
## Press Release Information
Title: [Chance for a Full Refund!] Pre-sale Starts April 3 (Fri) at 9 AM on CAMPFIRE: The Magic That Transforms 'Listening While Aware' | 'Bone Conduction x Air Conduction' Dual Driver Earphones
Subtitle:
Company Name:
Industry:
Body (first 8000 characters):
[Project Launch Time] Monday, April 27, 12:00 PM
[Project Page] https://camp-fire.jp/projects/934632/view
Go to Project Page
**Up to 50% off if you purchase now!**
From Monday, April 27 to Thursday, April 30, by [favoriting & reposting an X (formerly Twitter) post], 3 winners will be selected by lottery from all supporters to receive a [full refund]!
β **[Project Launch Commemorative Benefit Participation Conditions]:**
1. Repost the X post below and add this official LINE account as a friend π§βπ€βπ§
π X Post: https://x.com/RJCLIFF3/status/2046156455569674333
π Official LINE Account: https://lin.ee/xoa4KKC
2. Click 'β€οΈ Favorite' on the CAMPFIRE project page
π https://camp-fire.jp/projects/934632/view
3. Purchase this product between April 27 and April 30 β¨
4. Send 'Earphones + X account name + CAMPFIRE account name' via LINE message to our company π
βοΈ By fulfilling the above conditions, you will be eligible for the full refund lottery.
Meet 'OpenDual'
To the endlessly continuing world of music
'Open New Audition.'
'I don't want to compromise on either high or low tones!' 'I want to fill every moment of my daily life with the colors of music!' ...... 'OpenDual', the IPX8 waterproof bone conduction x air conduction dual-driver earphones, answers all these desires.
With proprietary technology that goes beyond conventional wisdom, it achieves a hybrid sound of bone conduction (mid-high range) and air conduction (low range) while being IPX8 waterproof. It provides an unprecedented high-quality open-ear experience in any environment.
Bone Conduction x Air Conduction
Dual Speaker Equipped
Revolutionarily equipped with both bone conduction and air conduction speakers simultaneously. It fuses the clear mid-high range from bone conduction vibrations with the rich low range of air conduction, creating an immersive experience like being at a live concert. From the depth of bass to the delicate brilliance of treble, it faithfully reproduces details that were previously impossible to achieve with open-ear earphones equipped with only bone conduction or air conduction technology. It delivers sounds that were previously out of reach.
This is a groundbreaking earphone that overturns the conventional wisdom of open-ear earphones.
*Please note that for this project, 'OpenDual' will only be available in 'Black,' as shown in the product specifications image. Thank you for your understanding.
Designed with consideration for sound leakage, it minimizes sound leakage, allowing safe use even in quiet environments.
Highest Standard IPX8 Waterproof Performance
Fully waterproof even at 2 meters depth
Traditionally, achieving high waterproof performance has been difficult for air conduction due to the need for ventilation holes. However, 'OpenDual' has overcome this challenge with its unique sealing technology and special structure. It is a dual-driver earphone that achieves the highest standard, IPX8.
It is perfect for people who want to enjoy music while swimming, as it is fully waterproof even with sweat from exercise or sudden rain, and at a depth of 2 meters.
It can also be washed with water if it gets dirty due to its high waterproofness, which is a great advantage for everyday use without worrying about dirt.
*IPX8 standard: Submersion in 2 meters of water for 30 minutes without ingress.
Open-Ear Design That Doesn't Block Your Ears
Minimal pressure, maximum comfort
Since you can enjoy music without blocking your ears, there is almost no pressure even after prolonged wear.
It naturally incorporates ambient sounds, making it comfortable for commuting or running.
32GB Built-in Storage
More freedom for music
'Can't use it without my smartphone...' That era is over.
Enjoy music even without your smartphone. With 32GB of large-capacity internal storage, you can save up to approximately 8,000 songs inside the earphones*. Therefore, you don't need to carry or connect separate devices like a smartphone during exercise, allowing you to dive into the world of music anytime, anywhere!
*Approx. 8,000 songs: Calculated at 4MB per song.
From Monday, April 27 to Thursday, April 30, by [favoriting & reposting an X (formerly Twitter) post], 3 winners will be selected by lottery from all supporters to receive a [full refund]!
β **[Project Launch Commemorative Benefit Participation Conditions]:**
1. Repost the X post below and add this official LINE account as a friend π§βπ€βπ§
π X Post: https://x.com/RJCLIFF3/status/2046156455569674333
π Official LINE Account: https://lin.ee/xoa4KKC
2. CAM
Title: [Chance for a Full Refund!] Pre-sale Starts April 3 (Fri) at 9 AM on CAMPFIRE: The Magic That Transforms 'Listening While Aware' | 'Bone Conduction x Air Conduction' Dual Driver Earphones
Subtitle:
Company Name:
Industry:
Body (first 8000 characters):
[Project Launch Time] Monday, April 27, 12:00 PM
[Project Page] https://camp-fire.jp/projects/934632/view
Go to Project Page
**Up to 50% off if you purchase now!**
From Monday, April 27 to Thursday, April 30, by [favoriting & reposting an X (formerly Twitter) post], 3 winners will be selected by lottery from all supporters to receive a [full refund]!
β **[Project Launch Commemorative Benefit Participation Conditions]:**
1. Repost the X post below and add this official LINE account as a friend π§βπ€βπ§
π X Post: https://x.com/RJCLIFF3/status/2046156455569674333
π Official LINE Account: https://lin.ee/xoa4KKC
2. Click 'β€οΈ Favorite' on the CAMPFIRE project page
π https://camp-fire.jp/projects/934632/view
3. Purchase this product between April 27 and April 30 β¨
4. Send 'Earphones + X account name + CAMPFIRE account name' via LINE message to our company π
βοΈ By fulfilling the above conditions, you will be eligible for the full refund lottery.
Meet 'OpenDual'
To the endlessly continuing world of music
'Open New Audition.'
'I don't want to compromise on either high or low tones!' 'I want to fill every moment of my daily life with the colors of music!' ...... 'OpenDual', the IPX8 waterproof bone conduction x air conduction dual-driver earphones, answers all these desires.
With proprietary technology that goes beyond conventional wisdom, it achieves a hybrid sound of bone conduction (mid-high range) and air conduction (low range) while being IPX8 waterproof. It provides an unprecedented high-quality open-ear experience in any environment.
Bone Conduction x Air Conduction
Dual Speaker Equipped
Revolutionarily equipped with both bone conduction and air conduction speakers simultaneously. It fuses the clear mid-high range from bone conduction vibrations with the rich low range of air conduction, creating an immersive experience like being at a live concert. From the depth of bass to the delicate brilliance of treble, it faithfully reproduces details that were previously impossible to achieve with open-ear earphones equipped with only bone conduction or air conduction technology. It delivers sounds that were previously out of reach.
This is a groundbreaking earphone that overturns the conventional wisdom of open-ear earphones.
*Please note that for this project, 'OpenDual' will only be available in 'Black,' as shown in the product specifications image. Thank you for your understanding.
Designed with consideration for sound leakage, it minimizes sound leakage, allowing safe use even in quiet environments.
Highest Standard IPX8 Waterproof Performance
Fully waterproof even at 2 meters depth
Traditionally, achieving high waterproof performance has been difficult for air conduction due to the need for ventilation holes. However, 'OpenDual' has overcome this challenge with its unique sealing technology and special structure. It is a dual-driver earphone that achieves the highest standard, IPX8.
It is perfect for people who want to enjoy music while swimming, as it is fully waterproof even with sweat from exercise or sudden rain, and at a depth of 2 meters.
It can also be washed with water if it gets dirty due to its high waterproofness, which is a great advantage for everyday use without worrying about dirt.
*IPX8 standard: Submersion in 2 meters of water for 30 minutes without ingress.
Open-Ear Design That Doesn't Block Your Ears
Minimal pressure, maximum comfort
Since you can enjoy music without blocking your ears, there is almost no pressure even after prolonged wear.
It naturally incorporates ambient sounds, making it comfortable for commuting or running.
32GB Built-in Storage
More freedom for music
'Can't use it without my smartphone...' That era is over.
Enjoy music even without your smartphone. With 32GB of large-capacity internal storage, you can save up to approximately 8,000 songs inside the earphones*. Therefore, you don't need to carry or connect separate devices like a smartphone during exercise, allowing you to dive into the world of music anytime, anywhere!
*Approx. 8,000 songs: Calculated at 4MB per song.
From Monday, April 27 to Thursday, April 30, by [favoriting & reposting an X (formerly Twitter) post], 3 winners will be selected by lottery from all supporters to receive a [full refund]!
β **[Project Launch Commemorative Benefit Participation Conditions]:**
1. Repost the X post below and add this official LINE account as a friend π§βπ€βπ§
π X Post: https://x.com/RJCLIFF3/status/2046156455569674333
π Official LINE Account: https://lin.ee/xoa4KKC
2. CAM