Invisible Spy Earpiece: Discreet, cable-free earpiece for covert voice conversations and music listening. Inductive Technology: Receives signals across electromagnetic fields for discreet communication. Separated Components: Neckloop and earpiece communicate via inductive transmitter, allowing for hidden wear. Wide Compatibility: 3.5mm jack compatible with smartphones, tablets, eReaders, and other devices. Real-Time Communication: Small earpiece provides clear sound and built-in answer key for clear calls and smartphone control. Multi-Scene Application: Suitable for various scenarios and comfortable to wear with an anatomical design. Connectivity Technology: Wired for reliable connection and performance. Micro-Mini Earpiece: Utilizes wireless inductive receiver for clear sound and low power consumption. Listening Function Only: Supports cellphones, MP3 players, and more, without a microphone function. Dual Earpiece Support: Compatible with left and right earpieces for enhanced sound clarity.