YJ77 Business Single Ear Wireless Bluetooth-compatible Earhook Headset Air Conduction Hands-free Call Music Earphone - Black

• Air transmission technology can ensure sound quality and listening comfort to a greater extent
• The sound-generating unit is a pair of 16mm diameter composite biological vibration membranes, bringing better sound quality
• It can automatically adjust the low frequency and high frequency energy and enhance the tone at any volume quality
• Dual microphone directional radio enables clear communication in noisy environments, bringing quality communication experience
• 110mAh built-in battery, long use and standby time
• Bluetooth-compatible 5.2 chip, stable and fast connection

Specification:

• Bluetooth-compatible pairing name: OWS earphone
• Bluetooth-compatible version: 5.2 
• Bluetooth-compatible chip: JL6973D4
• MIC specification: Silicon Mark
• Signal to noise ratio: 97dB
• Rated power: 3mw
• Maximum power: 5mw
• Frequency response range: 20Hz～20KHz
• Impedance: 32Ω±15%
• Headphone sensitivity: 111dB ±3dB
• Headphone distortion: <5% CRY6151
• Bluetooth-compatible distance: ≧10m
• Speaker specification: 16mm
• Sensitivity: -42dB
• Headset battery type: polymer battery
• Headset battery capacity: 110mAh
• Headset charging current: 100MA
• Headphone charging time: 1H
• Music playback time: 16H
• Talking time: 16H
• Support protocol: A2DP/AVCTP/AVDTP/AVRCP/HFP