Purchased from an authorized retailer. This item is new and unopened. These wireless earphones feature a DAC and amplifier module praised as the highest level in sound quality, as introduced in the magazine "Kajelog." Earphones: Svanar wireless Brand: HIFIMAN Wearing style: Separate left and right, completely independent Earphone/Headphone type: Canal type Color: Silver Wireless/Wired connection: Wireless Earphone/Headphone features: Noise canceling, Microphone, Waterproof/Splashproof, Remote control Low-frequency range (Hz): 10.0 Hz High-frequency range (kHz): 35.0 kHz Wireless standard: Bluetooth Bluetooth codecs: LDAC, AAC, SBC IP standard (waterproof standard): IPX5 Charging port: USB-C Weight (g): 8.0 g 1128