Mesh of devices
18.5 m drone detection
50+ m spacing of sensors
30 min emergency battery power
3 nodes real-time tracking
Current price is $13 each
Self healing encrypted mesh.
300+ m audio localization with Doppler shift
500+ m sensor spacing
2+ month battery power, with more possible using aggressive sleep / wake cycles
$4-$6 each at 1000+ units for the full minimal board with PCB and assembly