VoiceBooster Tie-Clip Microphone for VoiceBooster (Aker) Voice Amplifiers by TK Products, LLC Tie-Clip Style Microphone 3.5mm male connection TK Products LLC is the only authorized USA Aker dealer. Which means that TK Products is the only seller that can and will provide Technical Support, Customer Service, and handle Warranty Claims. Support cannot be provide if purchased from another seller. Buy with confidence! Made for use with all VoiceBooster and Aker Voice Amplifiers, Works with other brands. 3.5mm connection with 39 inch cord, Clip on Boom/tip