GeekerMart · 極客谷 Sennheiser PXC 550 Wireless Over-Ear NoiseGuard NFC Wireless Headphones Key features: - Bluetooth 4.2 and NFC wireless connectivity - Frequency response: 17 - 23,000Hz - Impedance: 46 ohms (passive), 490 ohms (active) - Collapsible Product #: geekermart-Sennheiser PXC 550 Wireless Over-Ear NoiseGuard NFC Wireless Headphones Regular price: $HKD$1450.0 Available from: GeekerMart · 極客谷In stock