*Bluetooth V5.0 neckband earphone

*Dual Mic: detachable external Mic+in-built Mic

*Support: A2DP/AVRCP/HFP/HSP

*Working distance: 10m

*Battery capacity: 130mAh 3.7v

*Charging time: about 2h

*Speaker size: Φ10mm *4.8mm(H)

*Speaker sensitivity:98dB±3dB at 1KHz

*Speaker impedance:22±15% OHMS

*Speaker response frequency: 20Hz-20KHz

*Mic size: Φ4.0mm * 1.5mm(H)

*Mic sensitivity: -42±3 dB

*Mic impedance: 2.2KOHMS

*Mic frequency response:100~10KHz

*Total Harmonic Distortion:  ≦ 5%/10%(Speaker/Mic)

*【Deep Bass & Stereo Sound Quality】Built-in premium Bluetooth v5.0 chipset that offers CD-like stereo and strong bass sound quality. 

*【Easy Pairing & Stable Connection】Wireless earbuds with advanced Bluetooth technology with automatic reconnection. Bluetooth earphones provide a stable wireless connection to your Bluetooth Devices within 10 meters distance. Avoid the need to worry about typical issues like cut-off, playback delay, disconnection or failure at pairing. 

*【In-line Mic & Volume Control】The wireless headphones feature a microphone and volume remote buttons. Play, pause switch songs or change the volume all by remote control. Make hands-free calls and manage music easily and instantly. 

*【Long-lasting & Comfortable Fit】Upgraded 130mAh lithium batteries support up to 10 hours talk/listening time for prolonged enjoyment. Battery is fully charged after only 2 hours of charging. The headphones are lightweight.