Attach suction cup to a phone ear piece and let others in the room hear both sides of the conversation.
Cup picks up the magnetic field produced in the ear piece which is then amplified and fed to the speaker provided. Onboard volume control.
Instructions include details of how the kit can be used to trace mains wiring behind walls.Specifications
|Supply||6Vdc - 4 x AA battery holder supplied (battery Order Code 656.010)|
|Board Connections||Screw terminal blocks & solder pads|
|Product Formats||SELF-ASSEMBLY Electronic Kit (KT) or|
PRE-ASSEMBLED Electronic Module (AS) Product Formats Info