205 ear bug Spy Earpiece

Mini wireless earpiece (205 earpiece) receives
signal by inductive coil,
across electromagnetic fields
- Receiving distance: 50 70 cm
- Standard Zinc-air battery: type SONY 337
- Battery life: about 5 hours
- Audio bandwidth: from 300 Hz to 4 KHz
- Distortion: <2%
- Size: 3x5x7mm
- Working frequency: all frequencies
- Distance between inductive coil and Mini
wireless earpiece: about 70-100 cm.