Feature: 1. Suitable for business negotiation, school invigilation sites, factories, military facilities or government agencies to prevent secret photography and eavesdropping. 2. Can check hotels, restrooms, hotels, entertainment venues, changing rooms to prevent illegal camera. 3. Camera detector can detect whether wireless eavesdroppers are installed in your car or office. 4. Detect 5.8CHz wireless camera sneak shots, wireless eavesdroppers, and wireless monitor signals. 5. Receiving frequency of 1MHz ‑ 6.5GHz, as long as there is a signal, it can be detected, and when a signal is detected, an audible and light alarm will be issued. Specification: Item Type: Camera Detector Material: PC Charging Interface: Type-C Working Hours: 33 Consecutive hours Antenna Gain: -56dB Charging Power Supply: DC 5V/1A Battery: 3.7V/500mA polymer lithium battery (battery included) Sensitivity: 3 Levels adjustable Receiving Frequency Range: 1MHz - 6.5GHz Signal Detection Range: Approx. 5cm - 10m/2.0in - 32.8ft Signal Detection Range GSM: Approx. 50 - 300cm/1.6 - 9.8ft 3G & 4G: Approx. 20 - 100cm/0.7 - 3.3ft WIFI: Approx. 10 - 100cm/0.3 - 3.3ft Infrared Frequency Range: Approx. 750 - 1100nm Infrared Detection Range: Approx. 1 - 10m/3.3 - 32.8ft Optical Lens: Special optical glass Laser Detection Range: Approx. 1 - 15m/3.3 - 49.2ft. Package List: 1 x Detector 1 x Lanyard 1 x USB Cable 1 x Manual