I'm selling these because I bought them as a spare but don't plan on using them. I only opened the package and tested them to take photos. Unused. Thank you. Wireless Earphones ATH-CKS30TW+ BK Matte Black Brand: Audio-Technica Solid Bass Wearing style: Separate left and right, completely independent Earphone/Headphone type: Canal type Color: Black Wireless/Wired connection: Wireless Earphone/Headphone features: Noise canceling, Microphone, External sound capture, Sound quality adjustment, Automatic power on function, Automatic power off function, Waterproof, Splash-proof, Remote control Low-frequency range (Hz): 5.0 Hz High-frequency range (kHz): 20.0 kHz Impedance (Ω): 20.0 Ω Sound pressure sensitivity (db): 110.0 db Wireless standard: Bluetooth Bluetooth codec: AAC, SBC IP standard (waterproof standard): IPX5 Drive system: Dynamic type Driver size (mm): 9.0 mm Charging terminal: USB Type-C Charging time: 2.5 hours Weight (g): 9.0 g I will also be listing on other sites, so please don't delay. If you have any questions, please ask in the comments section. Although it is new and unused, it has been handled by a person once, so please refrain from purchasing if you are extremely sensitive. *Please note that we are not responsible for any damages or injuries caused by use.