Purchased on Amazon. I tested the main unit once, but it was a bit too large and didn't fit, so I'm selling it. Includes instruction manual, warranty, and charger. [Amazon.co.jp Limited Edition] Bluetooth Headset Earaku 2025 Version with Microphone For Calls Only, Doesn't Block Ears Japanese Voice Guidance Wireless Earphones Bluetooth ENC Noise Canceling Open Ear Bluetooth 5.3 Lightweight Approximately 28g Ear Hook Type Wireless [Black]