【Brand New, Unopened】 I purchased this at Yamada Denki about six months ago, but I've kept it stored without opening it. Since it's unopened, I haven't checked the operation. If there are any defects, please handle them yourself. There are no noticeable scratches or dents on the outer box. The round seal is still intact, so I'm sure it's unopened. I will ship it via Yu-Packet Plus. I've set the shipping time to 4-7 days because I travel frequently for business, but if I'm not traveling, I'll ship it immediately. 【Quoted from Kojima Net】 Yamaha YAMAHA Fully Wireless Earphones Black Remote Control/Microphone Compatible Bluetooth TW-E3BB ● Yamaha's unique "Sound and Music Reality Expression" - Yamaha's unique "Listening Care" technology optimizes the sound balance according to the volume, reducing the burden on the ears. ● An Impressive Music Experience - Comfortable fit for enjoying music, with a wide variety of 6 colors. - Experience the dynamism of sound and music as it is, with the immersive feeling unique to a musical instrument manufacturer. ● Convenient features that support "Sound and Music Reality Expression" and "Impressive Music Experience" - Compatible with Qualcomm TrueWireless Stereo Plus for excellent connection stability. - Dedicated app "Headphones Controller", voice assistant (SiriR/Google Assistant) compatible. - Up to 24 hours of playback & charging case with 4-LED battery level indicator, waterproof (IPX5 equivalent) specification.