Sennheiser PXC 550-II Wireless - NoiseGard Adaptive Noise Cancelling, Bluetooth Headphone with Touch Sensitive Control and 30-Hour Battery Life (508337) - Newegg.com
Sennheiser MB 660 Bluetooth Headset with Noise-Canceling Microphone
Sennheiser MB 660 UC (507092) - Dual-Connectivity, Wireless with Noise– Wholesale Home