明友起重
MingYou Crane HandlingOver-ear active noise cancelling headset * Noise cancellation: 22db±2db * Effective bandwidth for noise cancelling :50-1000hz Bluetooth Version : V5.0 Chip : AC6925F Support : HFP,HSP,A2DP,AVRCP Operating Distance :≥10M Battery Capacity : 300mAh Play Time : 40h (ANC), 9h (Bluetooth), 6-7h (Bluetooth+ANC) Charging Time : 2H Speaker Dimensions : Φ40MM Impedance : 32 Ω Frequency Response : 20-20Khz Sensitivity : 108dB±3dB