Tube Wireless Microphone 1.Features:hand free,USB jack 2.Certificate: ... :2000 3.Lightweight:30g mic 4.laser,page up/down Tube Wireless Microphone,USB Wireless Microphone,Bluetooth Wireless Microphone Feature:1 ... MIC design,eliminating the line.4.Size:Staff of a small size, easy to use.5. LCD display power supply,low ...