Functional characteristics ¡ï classic sophisticated circuitry and reliable wireless signal transmission, penetration, transmission distance; ¡ï host uses switching power supply, low power consumption; ¡ï microphone battery with 9V battery, avoid general use 3V batteries need to increase the boost circuit, making the system more stable and reliable, and a microphone talk time longer; ¡ï 9V battery contacts and more secure. Avoid handling the microphone lead to poor contact microphone; ¡ï wireless microphone frequencies up to 40 different sets, 100 sets use the same occasion not string frequency, microphone optional handheld, lavalier, headset and other forms.