The Hytera PD705LT is a professional-quality walkie-talkie that is IP67 rated and so completely waterproof - ideal for environments where the radio could easily get wet or be accidentally dropped into water.

This has the clear plastic "audio tube" so it isn't so obvious that an earpiece is being worn.

The Entel HT644 is a top-quality marine-band walkie-talkie.

The HT644 is IP68 rated and therefore submersible.

This is a full "aircraft" type headset with sound-insulated speakers for both ears, and a boom microphone.

This is an earpiece / mic that has an "in ear" earbud and also a support fits around the back of the wearer's ear, and an inline microphone with PTT button that can be clipped to the wearer's clothing.

The Kirisun DP405 offers the benefits of digital transmission with flexibility (it can be programmed to use analog channels as well) and a keen price.