NKBT930 Stereo Wireless Neckband Sport Earphone HD Stereo Headset handsfree Magnetic HeadphonesDeliver stunning sound for an enjoyable listening experience.- Built-in large capacity battery for up to 10-12 hours working time and 100 hours standby time.- Works with Bluetooth 5.0 chips to ensure stable and fast connection.- IPX5 life waterproof rate can keep the sweat far away- Ergonomically designed earphones for long-time comfort.- Magnetic design for easy store.
BT version: 5.0
Transmission distance: 10m (accessible)
Battery: 3.7V / 135mAh
Call time: 10~12hours
Standby time: about 300 hours
Charging time: about 2 hours
Speaker sensitivity: 98dB
Frequency response range: 20-20kHz.