B073MFQZCK Sennheiser CX 7.00BT Wireless In-Ear Headphone, Bluetooth 4.1 with Qualcomm Apt-X, NFC one touch pairing, 10 hour battery life, 1.5 hour fast USB charging, multi-connection to 2 devices

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Bluetooth 4.1 wireless technology, NFC one touch pairing and Qualcomm apt-X support for True hi-fi sound
Up to 10 hour battery life with 1.5 hour fast USB charging keeps you connected with music and calls
Convenient multi-connection with up to 2 devices simultaneously (phones and computers) with 3-way calling capability
Personalized fit using 4 different size in ear adapters provides excellent attenuation of ambient noise
Two-year warranty when purchased from an authorized Sennheiser dealer. Connectivity Technology: Bluetooth 4.1 and NFC