SX23 Noise-Canceling Mini Wireless Lavalier Microphone Name: SX23 Wireless microphone Model: SX23 Material: ABS Private mold: Yes Polar pattern: Omni-directional Signal to noise ratio: 64dB Frequency response rate: 20Hz-20KHz Maximum spl: 110db Sensitivity: -41dB±2dB Connector type: Type C, For Iphone Communication: Wireless Battery for mic: 80mAh Battery for charging case: 800mAh Color: Black Working time: 6hours Transmission: 20meters Microphone: with 2 microphones and 1 receiver