Conformable earloop with fixed boom microphone, and can be made to your technical description.
1. Speaker:
(1) Frequency response: 20~20000Hz.
(2) Sensitivity: 105+/-3dB.
(3) Impedance:32(ohm)+/-15%at1kHz.
(4) Max input:10mw.
2. Microphone:
(1) Frequency response: 50~20000Hz.
(2) Sensitivity: -58+/-2dB F=1kHz P=1Pa.
(3) Rated: DC4.5V.
(4) Min operation voltage: DC1.0V.
Convenient ear hook for both right and left ear, and provides quality, clear sound.