Pierre Nakano Model Only confirmed pairing and sound output. The left-side earphone did not work. Thank you. Fully wireless earphones TE-BD21f-BK Black Brand: AVIOT Wearing style: Separate left and right, completely independent Earphone/Headphone type: Canal type Color: Black Wireless/Wired connection: Wireless Earphone/Headphone features: Microphone, Waterproof, Splashproof, Remote control Low-frequency range (Hz): 20.0 Hz High-frequency range (kHz): 20.0 kHz Wireless standard: Bluetooth Wireless function: Multi-pairing Bluetooth version: Bluetooth 5.0 Bluetooth codec: aptX, AAC, SBC IP standard (waterproof standard): IPX5 Drive system: Hybrid type Driver size (mm): 9.0 mm Charging port: USB Type-C Charging time: 2.0 hours Weight (g): 5.4 g