❣️ Instant purchase OK! ❣️ One-of-a-kind, first-come, first-served! Brand new, unused bone conduction headset! Shipped via Rakuraku Mercari's Takkyubin Compact! 【Industry First! The Best Bone Conduction Earphones for Beginners】 Unlike conventional earphones that transmit sound through the eardrum, Erssimo's bone conduction earphones use the latest proprietary bone conduction technology, transmitting sound as vibrations through the bones to the brain! The first-ever bone conduction earphones feel as light as a feather, weighing only 29g!! You can hear music without blocking your ears, so there's no feeling of pressure, and you won't get tired even after long hours of use! Furthermore, we have succeeded in reducing sound leakage by approximately 50% compared to conventional bone conduction earphones! 【Perfect for Sports! The Best Running Partner】 Erssimo's bone conduction earphones use a titanium frame that provides a soft yet secure hold, so they won't fall off even if you shake your head from side to side or strain yourself. The neckband is also soft and flexible while maintaining its holding power, providing a secure fit even during intense training such as weight training! Compatible with the waterproof and dustproof standard [IP55], it's also perfect for rain and sweat! You can easily control "music playback/pause, skip forward, skip back, volume up, volume down, answer/hang up/end calls" with one hand. 【Truly Wireless Bone Conduction Earphones Bluetooth - Enjoy Music More Freely!】 Bluetooth 5.0 communication provides a stable Bluetooth connection that won't be affected by congested radio wave environments outdoors! Being a completely wireless type, you'll be free from the hassle of cables, and it'll feel like music has become a part of you! Furthermore, it excels in noise reduction technology during hands-free calls, making it ideal for teleconferences. It's also suitable for long meetings and long phone calls. 【Type-C Fast Charging & 8-Hour Battery Life】 This product ensures up to 1.2 hours of use with a 10-minute quick charge. The bone conduction earphones HS1 are slim and lightweight, yet the battery lasts a long time. Continuous playback time is up to 8 hours. 【Package Contents】 Bone conduction earphones *1 USB charging cable *1 Earplugs *2 Japanese instruction manual *1