Wireless Microphone - Dual channel UHF wireless microphone system with sleek design and adjustable frequency setup. It combines quality sound, simple setup, and intuitive interface for excellent audio performance. The microphone capsule is specially engineered to effectively capture and transmit sound without feedback and unwanted ambient noise with its cardioid polar pattern. ideal for public speaking, conference meeting, singing, churches and outdoor events. Operating distance is up to 160 ft in wide open space. ATTENTION 1. You will need to connect this system to extra audio equipment like amplifier/speaker to output the sound. It DOES NOT come with speaker. 2. Please keep the receiver away from Bluetooth or other digital devices (such as cellphones, jukebox, DVD, etc.) to avoid potential sources of interference. 3. Please do not face the microphone to the receiver too closely, in order to avoid feedback and statics.