D shape and lapel mic: this is a 1 wire kit, with an in-line PTT button and microphone. The D-Ring style fits perfectly over an ear, allowing secure hands free operation to the User.

Pros: Perfect for multi users (can be wiped clean with antiseptic cloth) and great for any environment.

Cons: The D ring fits over the ear and can be irritating to the user over long periods, 1 wire kits are limiting to wear.