Model Name:NB121

 Advance - 100 Hours Playtime Bluetooth Neckband

Headphone Type:In the Ear

Connectivity:Bluetooth

Headphone Design:Behind the Neck

Deep Bass:Yes

With Microphone:Yes

wireless version:v5.0

support:HSP,HFP,A2DP,AVRCP

operating ranga:3.7V

Speaker Impedance:32