Bluetooth version: v5.0
channel system: stereo (two-channel)
battery capacity: 250mah li-ion battery
drive unit: 40mm
charging time: 2 hours
call duration: 12 hours
music duration: 15 hours
material: abs
waterproof ipx5
support protocol: hsp1.0/hfp1.5/a2dp1.0/avrcp1.3
sensitivity: 90 ± 3db
frequency range: 20-20000hz
resistance: 16ω