IO Crest SY-AUD23064 Neck-Hook Bluetooth 4.0 Stereo In Ear Earbuds Headphone with NFC Support Bluetooth 4.0 - Supports HFP/HSP/A2DP/AVRCP Supports NFC Operating Range 8m^Standby Time: 100 hours Talk Time: 8 hours Supports NFC Operating Range 8m Standby Time: 100 hours Talk Time: 8 hours