Alpha Digital BH-530-R Bluetooth Headphone with Soft Fit Ear Covers, Built-in Microphone, Red NFC super east one-touch pairing to Bluetooth devices. Connectivity Technology: Wireless Hi-Fi Sound Quality, clear highs and rich bass, welcome comparing with tier 1 brands Bluetooth headphones Built-in microphone allows auto switch between calls and music. Long transmission Distance up to10 meters (33 feet) Link to two Bluetooth devices at the same time to Share music with your friend