PQ3 Bone Conduction Wireless Earphones (C-6269).

Wireless Earphones specifications:
Bluetooth version: V5.3,
Talk time: about 6 hours,
Music playing: about 6 hours,
Standby time: 80 hours,
Communication distance:>10M,
Charging time of headset: about 1 hour,
Headphone battery capacity: 30mAH,
Battery capacity of charging chamber: 300mAH,
Frequency characteristic: 2.40GHz – 2.48GHz,
Support protocol: A2DP1.3/HFP1.6/HSP1.2AVRCP1.6/D11.3,

Multiple use key:
Pause/Play: Click MFB
Previous song: double-click the MFB key on the L side
Next song: double-click the MFB key on the R side
Volume increase: three clicks on the L side
Volume key: three clicks on the R side
Answer the call: Double-click MFB
Hang up the phone: double click the MFB key
Incoming call rejection: long press MFB key for 2 seconds
Cancel call: double click MFB key
Call Siri: click the left or right MFB key three times when the song is not playing
Cancel Siri: Double click the left or right MFB key