✵ Please read the profile before purchasing ✵ ✎ No comment, instant purchase OK ✎ Please check the actual photos for the condition of the product. ✎ Depending on the size and weight, the shipping method may be changed from regular mail to Mercari mail or regular mail to Letter Pack, but please understand. ✎ There may be damage to the outer box and packaging. ✎ Please contact us before evaluation if there are any problems. ↓ Quoted from the following site Brand: ACREO Color: Black Headphone type: Over-ear Frequency response: 20000 Hz Model name: ACREO OpenBuds 【Earphones that don't block your ears - More healthy & safe innovative design】 ACREO Openbuds are innovatively designed next-generation true open-ear wireless earphones, equipped with a large 16mm high-quality audio driver and a 3W independent headphone amplifier, eliminating the discomfort of low-frequency vibrations of bone conduction earphones, and providing a more perfect sound field experience than bone conduction earphones. 【Earphones with microphone - Clear call experience】 Each earphone is equipped with a highly sensitive silicon microphone, which works in conjunction with a professionally tuned ENC noise reduction algorithm to achieve high-precision call performance. It is very useful in various situations such as web conferences, telework, home delivery, driving, and customer support. 【Enjoy a private concert hall at your ears】 Using a maximum 3W independent headphone amplifier to drive the speakers, after 15 months of research and development, repeatedly customizing three versions of the speakers, and performing 108 times of acoustic tuning, finally bringing an unprecedented powerful sound field experience. 【Super convenient and easy-to-use fully wireless earphone design】 The earphones can be used separately and will connect automatically. The playback time of the earphones is 6 hours on a single charge, and up to 18 hours when using the case. 22-4