Easy-to-use detection sensor to prevent intrusion from eavesdropping devices and hidden cameras. - Brand: REVEX - Model Name: +Guard-S - Type: Detection Sensor - Function: Countermeasures against eavesdropping devices and hidden cameras - Operation: Easy operation - Accessories: With key chain Thank you for viewing. The packaging is slightly deteriorated, but the main unit is almost unused and has been tested for operation. Thank you.