Portable Hidden Camera DetectorThe wireless signal spy camera detector is about the size of a pen, lightweight and very portable. Whether you are in a hotel or traveling, it can protect your privacy whenever you feel watched or doubt the security of your surroundings. Two Kinds of AlarmOur WiFi signal detector has two alarm modes, one is beeps sound, the other is vibration mode, you can choose any mode you like to work. If you find the beeps sound too noisy, you can choose to tap the power button once and switch to vibration mode. The vibration frequency is high enough that you can also feel the warning.