Style:In-Ear  , Noise cancel  Noise reduction decibels: -28dB   Bluetooth version: 5.4
Charge voltage:DC 5V    Sensitivity: 106 db
Frequency response: 20 hz - 20 KHZ
Impedance: 32 ohms
Battery capacity: 45mAh
Bluetooth distance: above 10M
Bluetooth starting frequency: 2402-2480MHz
A2DP HFP HSP AVRCP
Charge time: about 60 minutes
Music playing time: about 2-4 hours
Talk time: about 1-2 hours
Storage time: about 60 days
Storage temperature range: -20-60 degrees Celsius
Operating temperature range: -10-45 degrees Celsius
Charging box:
Battery capacity: 350mAh
Charging time: about 2 hours
Input voltage: DC5V
Storage temperature range: -20-60 degrees Celsius
Operating temperature range: -10-45 degrees Celsius