1. UHF Microphone System: Adopt UHF fixed high-frequency circuit design, easily avoid interference frequency. Provides clear, powerful, best authentic sound. 2. Long Distance: Open space line of sight up to 260ft. Upgrade the wireless signal acquisition, install 2 antennas on the back of the receiver, enhance the received signal, and ensure high-frequency stability and accuracy. 3. High Quality: Lightweight 4 handheld wireless microphones with individual volume control for each channel for precise sound balance. Brushed metal design receiver for optimal aesthetics and durable long life. 4. Wide Compatibility: Four XLR outputs and one 1/4 inch (6.35mm) mix output allow you to connect this versatile system to most amplifiers/mixers/powered speakers on the market. Plug and play for easy setup. 5. Multiple Applications: 4 mics and 1 receiver, perfect for karaoke with friends and family, parties, church, DJ, weddings, business meetings, classroom activities, outdoor or indoor stage performances, etc. Specifications: Overall System 1. Number of channels: 4 channels 2. Carrier frequency range: 500-580MHz 3. Frequency response: 50Hz-15kHz 4. Open range: 80m (under typical conditions) Receiver 1. Sensitivity: Greater than -80dB 2. Audio Output: Balanced and Unbalanced 3. Power Requirement: DC 12V/1000mA Transmitter 1. Cartridge: Dynamic 2. RF Output: Less than 10mW 3. Normal Deviation: 22kHz 4. Batteries: Two 1.5V AA Batteries (not included)