Wireless Signal RF Detector Tracer Mini Camera Finder Ghost Sensor 100-2400 MHZ GSM Alarm Device Radio Frequency CheckProduct Description Ghost Detector adopts wireless RF detection to check if there are any wireless devices with the frequency between 100 2600MHz ranging from 1m to 10m. By using it. the possibility of being tapping or recording will be greatly cut down on the situation below: 1. business negotiation or signing contracts 2. in the restaurant, hotel, wc, place of entertainment or dressing room. etc.