Features: Plug and play with no settings, microphone run on 2 * AA batteries(not included), easy to carry. Dynamic microphone with high fidelity sound quality, anti howling, great anti-interference capability. Perfect for stages, ballrooms Karaoke, families party, meeting, as well as for giving a speech, presentation, public address.Specifications: Plug: EU Material: ABS Input: AC100-240V, 50/60Hz Output: DC12V, 1.0A Item Weight: 871g / 30.73oz Package Weight: 1148g / 40.52oz Package Size: 37.5 * 29 * 6cm / 14.76 * 11.42 * 2.36in Receiver: Frequency Range: High frequency Frequency Channel: 16 channels, the ID code changes randomly Oscillation Mode: DSP chip frequency lock Frequency Stability: ±10ppm Receiving Sensitivity: -95~71dBm Frequency Response: 40-18KHz Signal to Noise Ratio: >90dB Audio Output: 300mV(maximum) Size: 216 * 149 * 45mm / 8.51 * 5.87 * 1.77in Microphone: Frequency Channel: 16 channels, ID code is changed random Oscillation Mode: DSP chip frequency lock Frequency Stabillity: ±10ppm Frequency Power: 10dBm Frequency Response: 40-18KHz Distortion: ≤0.5% Power Supply: 2 * 1.5V AA battery (NOT included) Working Hours: 4-8 hours Frequency Range: 630-690MH Use Range: 30-50 meters Size: 267 * 48 * 48mm / 10.51 * 1.89 * 1.89inPackage List: 1 * Receiver 2 * Microphone 2 * Ring 1 * 6.35mm Audio Cable 1 * Charger