Wireless Dynamic Microphone Rechargeable Auto Pairing Universal Handheld Karaoke Mic for Speech Wedding Party Singing Item Type: Wireless Dynamic Microphone Material: ABS Modulation: Fixed Frequency Frequency Range: 700 to 800MHz Preset Frequency: Auto Pairing Frequency Response: 50Hz to 15khz Maximum Frequency Deviation: ±50KHz (With Level Limit) Distortion:≤0.01% Signal to Noise Ratio:≥98DB Effective Reception Range:≤ Approx. 50meter / 164ft RF Carrier Stability:+0.005%(-10°C to 50°C) Battery Type: Lithium Battery Receiver Battery Type: 1x18650 Battery (Not Included) Handheld Microphone Battery Type: 1x18650 Battery (Not Included) Microphone Carrier Frequency Power: 30mW