We are professional headset manafacturer for many years from china .We can supply vary kinds of headsets with or without QD function for call center ,office ,telemarketing service , unified communication . Telaphone headsets,wired headset,wireless bluetooth headsets , UC USB headsets for reference . 2.5mm,3.5mm,USB,RJ9 headset adapters for choose . All our products past CE&FCC approvals. Good afrer-sales service . Short delivery time . You are warmly welcomed to contact to get a competitive price .