Wireless Microphone System Receiver with Handheld Mic UHF Anti-Howling and Reverberation Function for Home Cinemas Karaoke Church Speech Wedding Party Singing Rechargeable Wireless Microphone Frequency Response: 50Hz-15KHz Receiver Signal-to-Noise Ratio:>50B (A) Receiver Charging Time: About 2-3 hours, automatically turns off when fully charged Receiver Battery Life: It can be used for about 4-5 hours when fully charged Receiver Sensitivity: 5dBUV Receiver Receiving Mode: UHF - about 50M Receiver Distortion: <2% Maximum Current of Receiver: 310mA Receiver Battery Capacity: Built in lithium battery 2000mAh/3.7V Microphone Reception Mode: UHF Microphone Distortion: ≤ 0.5% Maximum Current of Microphone: 120-140mA Microphone Pointing Feature: Heart-shaped Microphone Delay:<3ms Microphone Dynamic Range: 100B (A) Microphone Oscillation Mode: crystal oscillation Microphone Carrier Frequency Range: 610MHz-699MHz (Note: The frequency range in the manual is for reference only, and the actual frequency range is subject to the actual product.) Microphone Working Channel: CH0-50 Microphone Charging Time: About 2-3 hours, automatically turns off when fully charged Microphone Battery Life: When fully charged, it can be used for about 8-12 hours Microphone Battery Capacity: Built in lithium battery 1300mAh/3.7V Product Color: Black Product Style: 1 Receiver with 1 Microphone, 1 Receiver with 2 Microphones (optional) Microphone Size: 250 * 53mm/9.8 * 2.1inch Receiver Size: 115 * 46 * 25mm/4.5 * 1.8 * 1 inch