Specifications:

• Signal Type : Radio Frequency
• Build-in 600MAH lithium battery & Life : 8+ Hours
• Number of Channels : 3
• Frequency Response : 20-20000Hz
• Frequency : 863/915/433MHZ
• Distance : 250meters of distance
• Buttons : Individual Volume and Channel Control
• LED Channel Indicator Lights, Adjustable Comfort-Fit
• Support Memory Card : NO
• Water Proof : NO
• Active Noise Cancellation : YES
• Resistance : 32 Ohms