Description : Wireless . Speech teaching microphone has frequencies for each channel , less prone to electric appliance interference and offers stable signal transmission and allows multiple sets working together without interference , 50m transmission receiver , low distortion , low noise , makes the vocals are more prominent and true Universal . Volume with 3 . 5mm plug , 6 . 35mm adapter , suitable for microphone , speakers , , computer , etc . Head Wear Mic , plug and play , 2 in 1 headset and handheld design switch freely to meet your needs in different situations . Portable . Handheld microphone , small size , easy and convenient to carry outdoor . Multifunctional . Professional Mic designed for vocal use in live performance , sound reinforcement , studio recording , class , public speaking and trainings , and mind . Size Chart : 19cm x 13cm x 5cm / 7 . 48inch x 1 . 97 . 12inch x 5inch Package Includes : 1 Set Multi Microphone Kits Note : Please allow slightly errors due to manual measurement and different monitors .