This is a communications set, which consists of a bone conduction earphone and a high-performance microphone. Hearing sounds by vibrations does not excessively tire the ear and does not require headgear. A-hum E has the following features:
●The earphone unit does not have air holes because it uses bone conduction. This drip-proof unit is strong against sweat and water drops and can be cleaned by wiping with a wet cloth even when it is dirty.
●Hearing sounds by bone conduction rather than via the eardrum reduces fatigue even after long 　hours of work.
●The microphone has a directivity function and can transmit signals even under noisy environments.
●A digital transceiver is supported.

・Model number: GD-AE

Bone Conduction Earphone (one earplug type)
・Model: Dynamic type.
・Driver: Diameter 10.
・Sensitivity: 83 ± 3 dB.
・Playback band: 50 to 10,000 Hz.
・Maximum input: 125 mW.
・Impedance: 8Ω.
・Mass: 15 g (including cord).
・Cord length: 60 cm.
・Plug: Diameter 3.5 or 2.5stereo mini-plug.
・Color: Black.
・No headgear is attached.

PTT microphone
・With 360-degree turning clip.
・High-performance microphone 250 (Earphone jack: Diameter 3.5).
・High-performance microphone 230 (Earphone jack: Diameter 2.5).