Drone Media, page-119

2nd August 2019:
“RfZeroTM is an omnidirectional drone detection device with a 1km range. It is designed to be a cost-effective fixed site alternative to DroneShield’s higher end product, RfOneTM (a 5km radiofrequency direction finder). As such, RfZeroTM responds to the needs of users with more substantial budgetary constraints. As is the case with the rest of DroneShield’s fixed site product family, RfZeroTM uses DroneShieldCompleteTM, DroneShield’s proprietary counterdrone software user interface. It is also able to integrate with the rest of the fixed site DroneShield product suite, such as DroneCannonTM for either automated or manual drone defeat, once RfZeroTM detects the drone.
RfZeroTM is completely non-emitting, thus allowing for a substantially larger customer universe. Given that the product thus lacks this regulatory constraint, and is marketed at a lower price point, the product is expected to be of a substantial appeal to a wide array of customers.”

If a 1km perimeter breach is detected, the RFZero would send an alert to the users security provider and most likely the users phone telling them what time it was detected and in which direction the alert came from.
The user can then deploy these highly advanced countermeasures:
1. Close the blinds.
2. Call the authorities.
3. Give drone the finger.