Thank you very much for viewing! ^ ^ I have hardly used it, only to confirm the Bluetooth connection after charging. Please check the outer box as it has a tear as shown in the image. A standard model that is easy to use every day ・Make working from home and telework even more comfortable Have smooth video conferences with clear audio. It's a convenient neckband that you can hang around your neck after you're done. *May not be compatible depending on your PC (model). ATH-CKR300BT: Internal structure image ・Sound without impurities: Newly designed φ9.8mm driver that brings out the original sound To achieve both high sound quality and excellent wearing comfort in a small body, linearity* is improved with a top-mount PCB. Reproduces sound without impurities. *Linearity: When an output signal is converted to sound and amplified in response to an input signal, it is faithfully reproduced according to a certain ratio. Use it to your heart's content Up to approximately 8 hours* of continuous playback With a charge of approximately 2 hours, you can listen to music for up to approximately 8 hours. You can enjoy it from commuting to listening at home. *Varies depending on usage conditions. ATH-CKR300BT: Up to approximately 8 hours of continuous playback on a single charge Easy operation at your ears With a convenient in-line controller You can easily turn the power ON/OFF, play/pause music, skip forward/backward, answer/end calls, and adjust the volume at your ears. ATH-CKR300BT: Sound Reality series Smartphone voice recognition function Access Siri®/Google Assistant™️ You can access Siri®/Google Assistant™️ using the operation buttons. By simply calling out through the microphone, it supports your daily activities such as reading messages and notifications, and providing route guidance. *Siri® is a registered trademark of Apple Inc. *Google and Android are trademarks of Google LLC. ATH-CKR300BT: Smartphone voice recognition function ・Sealed type that prevents sound leakage Reduces sound leakage that you may be concerned about when listening on trains and buses during your commute. Comfortable to wear Thank you very much. m(_ _)m