Product information:

Transmission range: 10 meters
Function: Power display, call function, voice control, support music
Bluetooth protocol: 5.0
Channel: Stereo
How to use: Earplug type
Single or dual ear: Bilateral stereo
Power supply: USB
Acoustic diaphragm: aluminum-plated liquid crystal polymer diaphragm
Sound unit: 10* 5mm customized Hi-Fi mini full frequency unit
Acoustic structure: closed
Magnet type: neodymium iron boron
Frequency response range: 50Hz-24kHz
Resistance: 160
Sensitivity: 98±3dB
Maximum output performance: 30mW (IEC)
Single Z9 with charging compartment: can play music for 24 hours, or talk for 20 hours
A single fully charged Z9: can play music for 9 hours, or talk for 8 hours

Packing list:

Bluetooth headset*1