Defender Twins 638

Connection type wireless Bluetooth
Type of headphones
true wireless
Type of earcups
closed
Battery capacity
300 mA·h
Bluetooth specification
V5.4 + EDR, A2DP, AVRCP, HFP, HSP
Operating tempreature range
-20—60 °
Operating frequency
2.402—2.48 GHz
Membrane diameter
10 mm
Sensitivity (headphones)
105 dB
Sensitivity (microphone)
-42 dB
Frequency response (headphones)
20—20000 Hz
Frequency response (microphone)
100—16000 Hz
Operation range
0—10 m
Continuous talk / listening period
9 hrs
Connectors
Micro-USB for charging
Material of headphones
plastic
Color
black