AVTronics 200 Channel Wireless Handheld Microphone System with 200 Channels, 200-Foot Range, and FREE Lifetime Tech Support

200 channels (470.125-504.500 mHz) Working distances up to 200 feet IR sync capable Frequency selection mode Volume control and LCD display 30-day money-back guarantee 1-year manufacturer warranty FREE lifetime tech support Requires 2 AA batteries