Wireless Microphone UHF Wireless Dynamic Cardioid Sensitivity Mic with LED Display for Conference Computer Live Broadcast Feature: 1. Allows you to move freely and perform energetic and positive performances. 2. The front end is the most sensitive and the back end is the least sensitive. This isolates unwanted ambient noise and provides better reply cancellation than omnidirectional microphones. 3. Designed with for MicroUSB charging interface, easy to carry. 4. No wires, frequency auto pairing, AA battery powered handheld microphone, 18650 battery powered receiver. (Note: AA batteries and 18650 batteries are not included) 5. The microphone can be connected to multiple systems, including speakers, amplifiers, wireless microphone systems. Specification: Item Type: Wireless Microphone Product Material: ABS, Metal Microphone Battery: AA Battery x 2 (Battery Not Included) Receiver Battery: 18650 Battery x 1 (Battery Not Included) Working Range: Within 30m Signal To Noise Ratio: ?70db Frequency Response Range: 100HZ-20KHz Package List: 1 x Microphone 1 x Receiver