SENNHEISER MOMENTUM 4 Wireless Purchased about a year ago. Used indoors for a short time, only twice, so the condition is very good. Accessories are unused. Wireless Around Ear Headphones MOMENTUM 4 Wireless 509266 M4AEBT Black Brand: SENNHEISER MOMENTUM (SENNHEISER) Wearing style: Both ears, integrated left and right Headphone type: Headband Color: Black Headphone features: Noise canceling, sound quality adjustment Low-frequency range (Hz): 6.0 Hz High-frequency range (kHz): 22.0 kHz Bluetooth codec: aptX, AAC, SBC Wireless/Wired connection: Wireless, wired connection Drive method: Dynamic type Plug shape: Mini plug, 2.5mm (4-pole) Sound pressure sensitivity (dB): 106.0 dB Wireless standard: Bluetooth Charging port: USB Type-C Charging time: 2.0 hours