Check the listing for details. Better Music Builder VM-82U G5 - Dual Channel Karaoke Microphone System - NEW. Color: Gray, Condition: New. Listed at 624.99 USD. Verified: brand new. Never opened or used before. --The Better Music Builder VM-82U G5 is a Fifth Generation UHF Dual-Channel Microphone System that uses the latest technologies and engineering. Its heavy duty design features two handheld microphones with one 2-in-1 Base Module, Intelligent Energy Control, Automatic Gain Control (AGC) Technology, and Wireless Infrared Auto Sync System.The Wireless Microphones are equipped with six-axis gyroscope sensor to be the most intelligent and energy efficient microphones. Utilizing the sensor, the Intelligent Energy Control feature integrated onto the microphones has the ability to automatically enter Auto-Mute Mode and Auto-Shutdown when left unattended, greatly increasing the overall battery life.Automatic Gain Control (AGC) Technology is featured on all the latest Better Music Builder Wireless Microphone Systems. It adjusts the gain of a channel based on how loud or soft the input signal is. If the input is loud, the gain is turned down. If the input is soft, the gain is turned up.The built-in Wireless Infrared Auto Sync System makes setting up frequencies a breeze. Using the technology, there is no need to adjust the microphone frequency manually. It automatically syncs with a touch of the button to create a complete interference free and crystal clear microphone system.