Real-time intel for drug interdiction cops
Equip the back seat of your squad with an audio transmitter. Most departments have extra transmitters/mics from old in-car video camera systems. If not, you can purchase one fairly cheap. Most have a 1,000-foot range, which is more than enough. Conceal the mic in the headliner of back seat. Conceal the transmitter box at top of partition between front and back seats. Make sure the box is not visible in such a way to allow the red LED ‘transmit’ light to anyone in the back seat.