I purchased this online for my mother, but it seems I made a mistake. She said the audio and instructions are in Chinese and that she "doesn't understand," so I'm putting it up for sale. I opened it to check the operation and look at the instructions, but it's new. It was 3,580 yen on Rakuten. #Earphones #Bluetooth F805 Open-Air Bone Conduction Earphones 【Open-Air Design】 These earphones adopt an open-air design, allowing you to enjoy music while hearing the surrounding sounds. It's designed with safety in mind. 【Long Playback Time】 It can play for up to 10 hours and boasts a standby time of 75 hours. Suitable for long-term use, and charging is completed in just 1.5 hours. 【Latest Bluetooth Technology】 Equipped with Bluetooth V5.3, it achieves a stable connection and high-quality sound. Compatible with various devices. - Model: F805 - Bluetooth Version: V5.3 - Support Profiles: A2DP, AVRCP, HFP, HSP - Frequency Range: 20Hz - 20kHz - Playback Time: 10 hours - Standby Time: 75 hours - Charging Time: 1.5 hours - Battery Capacity: 75mAh - Charging Port: Type-C - Features: Open-Air Design - Accessories: Instruction manual, charging cable Thank you for looking.