Features:* 4-Channel Wirele Microphone System: The wirele 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.* Transmiion range: The wirele 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 wirele microphone has a solid all-metal construction for a four-channel UHF wirele 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.* Excellent Cordle Microphone: Perfect for home karaoke, meeting, party, church, DJ, wedding, etc. The excellent response of the wirele microphone is tailored for live vocal use. They're well-made metal cardioid mics, which means they pick up noise in one direction. With this polar pattern, directional vocals are easily isolated from background noise.Specification:Name: Wirele MicrophoneVoltage: 220VBattery capacity: 300mAh-500mAhBattery life: 8-12 hoursSignal-to-noise ratio: 60dBFrequency response range: 100HZ-20KHZMicrophone Type: DynamicPointing feature: heart-shaped pointingApplicable objects: home use, stage, ktv special use, meeting special use, interview special useSize: 19*9*5cmColour: BlackPacking included:1 * Receiver4 * Wirele Handheld Microphone4 * Anti-slip ring1 * Cable1 * Power AdapterNote:1. Due to manual measurements and slight color variations, please allow 1-3 cm (0.4-1.18 inches) difference to suit different display settings.2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.