Awei A780bl BT 5•0 Wireless/Wired Stereo Headphones(Black).

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