Wireless Microphone System Receiver with Handheld Mic Anti-Howling for Home Cinemas Karaoke Church Speech Wedding Party Singing Rechargeable Wireless Microphone Compatible with Amplifiers Speaker Frequency Range: 2400MHz~2800MHz Distortion: ≤ 0.5% @ 1KHZ Modulation Method: digital frequency modulation Output Level: 200mV ± 5mV Frequency Response: 50Hz~18KHz Sound Pickup Method: Dynamic coil/capacitive Signal to Noise Ratio: >90dB Microphone Channel A: 624.3MHz Microphone Channel B: 642.2MHz Microphone Oscillation Mode: Smart chip frequency locking Microphone RF Power: ≥ 10mw Microphone Audio Frequency Response: 40-18000Hz Microphone Distortion: ≤ 0.5% Receiver Power Supply: 3.7V/800mAh lithium battery Microphone Power Supply: 3.7V/800mAh lithium battery Product Style: 1 Receiver with 1 Microphone, 1 Receiver with 2 Microphones (optional) Microphone Size: 253 * 53mm/10 * 2.1inch Receiver Size: 115 * 35 * 25mm/4.5 * 1.4 * 1 inch