This spy camera and bug detector senses radio frequencies. It can be used with sound or silently (with vibration). So you can use it stealthily in public.
5X night vision monocular. Offers about 100 yards vision. Has IR light that allows vision in total darkness. One handed operation.
Get detailed specs and reviews here
This laser beam security setup is perfect for setting up temporary indoors intrusion detection. It’ meant for kids, but that just means it is durable enough to handle some abuse, and it’s cost-effective. Ideal for adding a door alarm to your hotel room if you’re travelling, etc.