Thank you very much for viewing. Here is an introduction to the Y [Used] GEO/WIRELESS HEADPHONE Geo Bone Conduction Headphones. ☆ Because it's a bone conduction type that doesn't block your ears, it's perfect for use during commutes or going to school, where you need to be aware of your surroundings. It can be used while having conversations, and it's an ear-hook type that doesn't easily fall off. It has no feeling of blockage and is designed to be gentle on the ears. [Important Notes] ・ We have confirmed that it can be used without any problems in our environment by connecting to Bluetooth on an iPhone. We have also confirmed that the charging lamp lights up when connected, but we do not know the frequency of use or the remaining battery level. Also, depending on the pairing status and battery level, you may experience difficulty connecting or hearing. Please consider this before making a purchase. [Specifications] Model Number: GRFD-BCH200B300 Transmission Output: Class2 Playback Frequency: 20Hz-20kHz Weight: Approximately 33g Earphone Body Battery Capacity: 180Ah Charging Voltage: DC5V Charging Time: Approximately 2.5 hours Continuous Talk Time: Approximately 5 hours Continuous Music Playback Time: Approximately 7 hours Continuous Standby Time: Approximately 200 hours ※ Because we also sell this product in our physical store, there may be changes in the product condition. Please understand this before purchasing. ※ Please understand that there may be minor scratches or stains due to storage. ※ Everything in the photos is included. Please purchase after viewing all the photos. ※ The color may look different depending on the device you are using. Please understand. ※ Please refrain from purchasing if you are looking for perfection or are very sensitive. ※ If there are any defects or deficiencies not mentioned in the product description, please be sure to inform us via the transaction message before contacting us. Please understand that we cannot accept returns or refunds after the transaction is completed. ※ The original box may have stains due to aging, so please consider it only for shipping purposes. Y.O