DPA d:fine™ Slim Capsule, Headset Mic., Dual Ear, Single In Ear 110mm Boom Interchangeable (Black) Mac Pro The external power supply charges

The external power supply charges the replays and generates the 48v phantom power needed to power condenser microphones that can be turned on or off for each mic

You can even have a friend fan the case open and closed for a wah-wah effect

Attack times are generally speaking

Zero-G Dream Zone (from Creative Essentials)

Fishman Sonicore Pickup / Ibanez AEQ-SP2 Preamp with Tuner

DPA d:fine™ Slim Capsule, Headset Mic., Dual Ear, Single In Ear 110mm Boom Interchangeable (Black) Mac Pro The external power supply chargesThe days of broadcast hosts having to fiddle with two parallel systems one for the mic and one for in ear communication are over. d: fine Slim In Ear Broadcast Headset Microphone, Omnidirectional offers natural sound reproduction, crystal clear in ear communication, great fit and convenience all in one headset. Staying true to the DPA legacy, the d: fine Slim In Ear Broadcast Headset Microphone, Omnidirectional offers accurate, natural voice