Purpose: Protection of speech information in the vicinity of a mobile phone owner by blocking eavesdropping attempts via cellular channels, including prevention of potential speech leakage through unauthorized activation of the phone's built-in camera. Advantages:
Dual-layer protection: Physically and digitally blocks phone microphones and speakers
Plug-and-play design: Installs directly into the 3.5mm headphone jack (compatible with wired headsets)
Anti-surveillance guarantee: Neutralizes covert remote activation of listening modes by disrupting the entire speech transmission pathway
Universal compatibility: Works with iPhone, Samsung, and other major brands (3.5mm jack required)
Key Technical Features:
Mechanical/software dual blocking of audio channels
Automatic activation when phone enters surveillance mode
Zero power requirement – operates passively via jack connection