2.4GHz Dual Channel Wireless Microphone System with Display Real Time Monitoring Clip On Microphone Kit Item Type: Wireless Microphone System Material: ABS Transmitter: Transmission Method: 2.4GHz digital frequency band Directivity: Omnidirectional Signal Modulation: Gaussian Frequency Shift Keying Frequency Response: 35Hz~18KHz Operating Distance: Barrier free 100 meters Signal To Noise Ratio: >84dB RF Output: <10mW Power Supply Mode: Lithium battery/DC 5V, capacity 400mAh (Battery Included) Sound Pressure Level: Built In Microphone: 120dB SPL Lavalier Microphone: 110dB SPL Battery Life: About 7 hours Antenna: PIFA antenna Sound Input: 3.5mm microphone line input, or built in microphone Receiver: Transmission Method: 2.4GHz digital frequency band Battery Life: About 7 hours Power Supply Mode: lithium battery/DC 5V, capacity 400mAh (Battery Included) Signal Modulation: Gaussian Frequency Shift Keying Antenna: PIFA antenna Operating Distance: Barrier free 100 meters Output: 3.5mm headphone hole 3.5mm output hole Output Level: -60dBV to -20dBV Weight: Approx. 392g / 13.8oz