Mini Nackband Headphone

Driver Specification
Driver: Φ 40mm mylar speaker
Impedance: 32+/-0% Ω
Sensitivity: 110+/-3dB(at 1K Hz)
Frequency Response: 20-20, 000Hz
Rated input power: 30mW
Maximum input power: 50mW

Microphone Specification
Element: Φ 9.7x6.7mm electret condenser microphone
Directivity: Omni-directional
Sensitivity: -42+/-2dB at 4.5V, 2.2K Ω
Frequency Response: 20-20, 000Hz
Operation Voltage: 4.5V-10V