Surveys suggest nearly half of travelers have discovered a camera in a rental or hotel. The good news: most hidden cameras can be detected in minutes once you know what to look for. This guide walks you through sweeping your hotel room using nothing but your phone.
1. Do a quick visual pass as soon as you enter
Before unpacking, walk the room slowly and mentally flag every object with a direct line of sight to the bed or bathroom. Hidden cameras need a viewing angle, so they are almost always aimed at the bed, shower or dressing area.
Pay special attention to smoke detectors, alarm clocks, power outlets and USB chargers, air purifiers, the bottom edge of the TV, mirror frames and decorative objects.
2. Turn off the lights and hunt for lens reflections
Every camera has a lens, and every lens reflects light. Turn the room lights completely off, switch on your phone's flashlight and sweep it slowly across suspicious objects. A glassy blue-purple glint deserves a closer look.
This works even better against infrared (night-vision) cameras: some phone front cameras can see IR LEDs as faint purple dots. In a dark room, point your front camera at suspicious spots.
3. Scan the room's WiFi network
Most consumer spy cameras stream video over the local WiFi. Join the hotel network and run a network scanner to see camera-like devices on the network — with vendor names and open ports.
SenseRadar's Deep Network Analysis does exactly this: it lists every device on the network, checks streaming ports and flags suspicious hardware. Disable your VPN and let the scan finish for the most accurate results.
4. Check Bluetooth and the ultrasonic spectrum
Some recording devices use Bluetooth instead of WiFi, or no network at all. A BLE scan reveals anonymous broadcasting devices nearby along with signal strength; as the reading approaches -30 dBm, you are closing in on the source.
Active electronics can also emit ultrasonic noise beyond human hearing. An ultrasonic spectrum analysis in a quiet room can expose the characteristic signature of a concealed recorder.
5. Physically check the hotspots
- Gently twist the smoke detector cover — real detectors have no lens.
- Pick up the alarm clock and USB charger; inspect the back and any pinholes.
- Do the mirror finger test: if there is no gap between your finger and its reflection, it may be a two-way mirror.
- Inspect outlets for extra holes and anything 'eye-like' facing the bed.
What to do if you find a camera
Do not touch or unplug the device — it is evidence. Photograph it in place, move out of its view, cover it with a towel if needed, and report it to both hotel management and the police. If you booked through a platform, leave a written record there too.