I purchased this on Amazon about a month ago for 3,999 yen. I used it only once, but I no longer need it, so I am selling it. Operation has been confirmed. BW000076-1 ZD46-16GB Amazon Description: ↓ Voice Recorder, Ultra-Small IC Recorder, IC Voice Recorder, 16GB Large Capacity, Ultra-Lightweight, 50 Hours Continuous Recording, Long-Distance Recording, HD Noise Reduction, Voice Detection, One-Touch Recording, Multi-Function, Large Capacity, Easy Operation, Portable, Compatible with Windows/Mac/Android/iPhone 【Ultra-Small Size & Unobtrusive!】 Ultra-small size (40*35*9.7mm)! It's easy to hide and inconspicuous, so it doesn't put pressure on the other person and allows for interviews in a natural atmosphere. It's compact enough to fit in your pocket and lightweight, so it's not a hassle to carry around. It's easy to use in everyday life and can also be used to record in your pocket in an emergency, making it very convenient. 【One-Touch Recording Start!】 Simply press the record button to easily start recording. No complicated steps, you can record important content as quickly as possible! It has a time stamp function, so the date and time are automatically recorded when recording. You can also manage recording files, and the date & time will be the file name, so you don't have to worry about managing them after recording. The file name is based on the date and start time, so it's easy to understand at a glance when checking, which is convenient. By connecting directly to a computer, you can transfer and back up voice and music files and data. 【50 Hours Continuous Recording & 16GB Large Capacity】 While compact, it has the advantage of being able to record for a long time. It can record continuously for up to 50 hours on a full charge and play back for 35 hours, and you don't need a memory card, so it's very convenient to use when traveling. With 16GB of storage capacity, you can save up to 284 hours of recording data. It is sufficient for everyday consultations and records. 【High Sound Quality, 360° Omnidirectional Recording & Voice Detection Function】 It can record with a sound quality of up to 1536kbps, and is equipped with advanced noise cut technology, so you can record very clearly. Equipped with high-quality, high-performance omnidirectional microphone built-in DSP noise canceling technology, it can play clear audio, which is very convenient when working on documents. Equipped with a 360° voice detection automatic recording function, it automatically starts recording without any operation when it detects sound.