Wireless Earphones H66 Used, Excellent Condition Body only Accessories (original box, instruction manual, charging cable) not included Charging cable is Type-C Although it's a used item, there are no noticeable scratches or stains, and it has been used sparingly. There are no problems with the operation. Although there is no instruction manual, I don't think it's particularly difficult to use. [Product Description] Brand: AIR TWINS Model: H66 Color: Black Control Type: Bluetooth Connectivity Technology: Wireless [True Wireless Earphones] These canal-type full wireless earphones have high sound insulation and low sound leakage. By incorporating a completely new 3-core chip, they cut up to 42 dB of ambient noise, allowing you to concentrate on your music without worrying about surrounding noise. The ergonomic and comfortable fit of the earphone body is ultra-small and weighs only about 4g, making it lightweight and easy to wear. [Equipped with Bluetooth Ver. 5.3 Function] These high-quality wireless earphones offer more comfort than ever before, featuring Bluetooth 5.3 + EDR, which has been gaining attention in recent years. The significantly improved synchronization performance achieves low power consumption and low latency, making it less prone to sound interruptions. [7 Hours of Continuous Music Playback - Enjoy Your Music All Day Long] Despite the compact design, the earphones themselves can play music or make calls continuously for up to approximately 7 hours when fully charged. Using the included convenient charging and storage case, you can charge the earphones about 10 times, allowing for a total of approximately 77 hours of music playback, so you can enjoy your favorite music as much as you like. [Experience One-Rank-Higher Sound Quality] The meticulously developed acoustic technology is condensed into these earphones! These Bluetooth earphones support AAC & SBC, Bluetooth audio codecs known for high sound quality and low latency, and are equipped with a φ14mm high-resolution driver in each earphone, allowing you to experience a clear sound image in silence.