Meke NB-1 Neckband Headset with Magnetic Attraction

Specifications:
Product Name: Wireless Neckband
Bluetooth version: Bluetooth V5.3
Speakers specification: $10mm
Frequency response: 20-20KHz
Output power: 20MW
Transmission distance (barrier-free) :10m
Signal-to-noise ratio: 85dB
Distortion: 1%
Battery specification: 3.7V220mAh
Charging time: 1-3 hours
Music time: about 20hours/50%vol
Standby time: about 500 hours
Sensitivity of microphone: -42dB #3dB
Support L2CAP/A2DP1. 2 (AVCTP1.3 /AVDTP1.2/ AVRCP1.3)