... Wireless Microphone 1.Features:hand free,USB jack 2.Certificate:ISO9001:2000 3.Lightweight:30g mic 4.laser,page up/down USB Wireless ... Microphone,Bluetooth Wireless Microphone Feature:1.Portable,convinient,microphone hands ... free,USB jack2.Certificate:ISO 9001:2000,Rohs,CE3 ...