VoiceBooster Headset Microphone for VoiceBooster (Aker) Voice Amplifiers by TK Products, LLC Headset Style Microphone with 3.5mm male connection The VoiceBooster brand is owned by TK Products, LLC. The VoiceBooster must be purchased through TK Products or one it's authorized dealers for Warranty Claims to be honored. Made for use with all VoiceBooster and Aker Voice Amplifiers, Works with other brands. 3.5mm connection with 39 inch cord. Adjustable Boom/tip Highly Directional Control Feedback. Make sure the white line on the microphone tip faces your mouth to control feedback.