Features:
1) Colorful and fashionable necklace hands-free kit
2) With PTT switch and detachable holder
3) High sensitive electret condenser microphone
4) Compatible with various kinds of mobile phones

Specifications:
1) Driver diameter: 15mm
2) Frequency response: 20Hz - 20kHz
3) Impedance: 32Ω
4) Sensitivity: 105±5dB
5) Max. input power: 10mW

Inner packing:
Polybag or customize

Outer packing:
Carton