Swimming pools and aquatic environments pose special problems for electronics. If you are an instructor and need to be in the pool while giving classes you can now safety use a wireless microphone to reinforce your instructions. With your wireless microphone transmitter inside the AmpliVox waterproof case you can now transmit to a wireless receiver located on the deck of the pool or house system. Use of a waterproof headset is recommended. Headset connects to special designed connector on outside of case. Unbreakable, watertight, airtight, dustproof, chemical resistant and corrosion proof case. Made of copolymer polycarbonate that makes it extremely strong and durable. External microphone jack. Adjustable (24” - 42”) yellow nylon waistband belt with quick release buckle.