130nm digital signal processing chip
4-channel automatic volume control (WDRC)
Hyper cardioid pickup pattern microphone
Double microphones
Middle-power output with low distortion
Adaptive feedback cancellation
Layered Noise Reduction
Automatically saving volume & Mode
Multiple functions with one button
3 program modes
Mode switch prompt tone
Volume change prompt tone
Low battery warning indicator
Booting delay prompt tone
Magnetic catch charging
Booting Automatically out of box,
Power off in the box
Audited Supplier 
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