Features: * 4-Channel Wireless Microphone System: The wireless microphone system provides 4 independent channels, each channel is equipped with a dedicated microphone and receiving box with independent volume control. The system also features automatic frequency scanning and automatic transmitter setup for easy synchronization between transmitter and receiver. * Transmission range: The wireless microphone system can support up to 200 feet range, 50 compatible frequencies (4 X 50) on each channel for interference-free reception, theoretically support up to 50 receivers and 200 microphones. The UHF frequency range is within 210 - 290 MHz and complies with FCC regulations. * High Quality: The wireless microphone has a solid all-metal construction for a four-channel UHF wireless microphone receiver and a high-sensitivity unidirectional handheld microphone for heavy use. The high-quality dynamic capsule is specially designed to limit feedback and interference, pick up sound smoothly and transmit sound with ease. Each microphone channel in this system has an individual volume control. Specification: Name: Wireless Microphone Voltage: 220V Battery capacity: 300mAh-500mAh Battery life: 8-12 hours Signal-to-noise ratio: ≥60dB Frequency response range: 100HZ-20KHZ Microphone Type: Dynamic Pointing feature: heart-shaped pointing Applicable objects: home use, stage, ktv special use, meeting special use, interview special use Size: 19*9*5cm Colour: Black Packing included: 1 * Receiver 4 * Wireless Handheld Microphone 4 * Anti-slip ring 1 * Cable 1 * Power Adapter