Product Type- Wireless * Gray; Built-in Speaker, Microphone; 3 per pack * Attached 6.5", 3 Sprong AC Power Cord * Control Volume and Power; Lockable talk button to monitor another room with confidence; FM circuitry provides clear, reliable reception and transmission; Call button signals other stations * 3 Channels( A-200KHz, B-270KHz, C-230KHZ); Transmission Range - 300 feet