Audio-Technica ATH-TWX9MK2 BK in black. Purchased in August 2025 and used for about 5-10 hours. I think the condition is good, so please consider it! Wireless Earphones ATH-TWX9MK2 BK Black Brand: Audio-Technica Wearing style: Separate left and right, completely independent Earphone/Headphone type: Canal type Color: Black Wireless/Wired connection: Wireless Earphone/Headphone features: Noise canceling, Hi-Res, Microphone, Ambient sound, Waterproof/Splashproof Low-frequency range (Hz): 10 Hz High-frequency range (kHz): 40 kHz Impedance (Ω): 16 Ω Sound pressure sensitivity (db): 105 db Wireless standard: Bluetooth Bluetooth codec: aptX, AAC, SBC IP standard (waterproof standard): IPX4 Drive method: Dynamic type Driver size (mm): 5.8 mm Charging port: USB Type-C Charging time: 2.5 hours Weight (g): 11 g