Country:China Model No:CBT204 FOB Price:6 ~ 15 / Piece ( Negotiable ) Get Latest Price Place of Origin:China Price for Minimum Order:6 per Piece Minimum Order Quantity:100 Piece Packaging Detail:1pc/ gift box Delivery Time:Order: 7 to 15 days, retail: 3 to 5 days Supplying Ability:50000 Piece per Month Payment Type:PayPal, Money Gram, Western Union, L/C, T/T Product Group :Call Center Headsets Specification: Bluetooth Version: V5.0 Mic Size: 6.5*5.0mm Mic Sensitivity: -44�±3db Speaker impedance: 32 �±15% Speaker Diameter 40mm Transmission Distance: about10meters Frequency: 20Hz~20kHz Battery Capacity:300mAh/5V Charging Time:2hours Standby Time: About300 hours Bluetooth Duration: About20hours