This is a great D shape earpiece and very popular across many industries. The unit is fitted with a Hi-Rose connector and so can be used on any radio for which you have the adaptor.
Dimension: Ø6mm x 5mm
Sensitivity: -40 ± 3 dB
Impedance: 32Ω ± 15%
Output Sound Pressure Level: 92 ± 3dB
Cable diameter: Ø2.0mm, Ø2.6mm
Material: Kevlar lined polyurethane