Pairing and sound have been confirmed. The charging port cover is missing. Sound and battery are good. Thank you. Wireless headphones ATH-CK200BT RD Red Brand: Audio-Technica Wearing style: Both ears, integrated left and right Headphone type: Canal type Structure: Sealed Color: Red系 (Red-based) Wireless/Wired connection: Wireless Headphone features: Microphone, Auto power-off function, Remote control Low-frequency range (Hz): 20.0 Hz High-frequency range (kHz): 20.0 kHz Impedance (Ω): 16.0 Ω Sound pressure sensitivity (dB): 100.0 dB Wireless standard: Bluetooth Wireless function: Multi-pairing Bluetooth version: Bluetooth 4.1 Bluetooth codec: SBC Drive system: Dynamic type Driver size (mm): 9.0 mm Charging port: MicroUSB Charging time: 3.0 hours Weight (g): 14.0 g