If you are concerned about personal privacy in various environments, this product can help address those concerns. Lightweight, portable, and efficient at detecting wireless signals, it assists in identifying potential privacy risks.Features: - Effective detection: Detects signals in the 100-2400 MHz range up to approximately 32.8 inches. Provides 360-degree coverage with no blind spots for enhanced privacy protection. - Wide application: Suitable for use in hotels, restaurants, public restrooms, changing rooms, business meetings, contract signings, and other locations where unauthorized devices may be present. - Reliable performance: Designed for accurate and consistent signal detection. - Simple operation: Easy to use—extend the antenna, press button A for long-range scanning, and press button B for short-range scanning. Intuitive design suitable for various users. - Portable design: Compact and lightweight with a retractable antenna for convenient carrying.Specifications: - Material: Plastic - Color: Black - Weight: 30g - Product Size: Approx. 6 x 4 x 0.7 cm / 2.3 x 1.5 x 0.3 in - Packing Size: Approx. 12 x 8 x 3 cm / 4.7 x 3.3 x 1.1 in - Antenna Length (extended): 16 cm / 6.2 in - Detection Band: 100-2400 MHz - Working Range: 1 m / 39.4 in - Working Voltage: 1.5 V - Battery: 12V/23A dry battery (included) Packing List: - 1 x Detector - 1 x User Manual Instructions: 1. Extend the antenna fully. 2. Press and hold button A to begin long-range scanning. When a radio signal is detected, the device will emit sound and the indicator light will flash, helping locate the source. 3. Press and hold button B for short-range scanning. The device will sound and flash when a signal is detected. 4. During short-range scanning, if interference occurs beyond 2 meters, adjust the antenna length as needed.Note: The device uses a 12V/23A battery that can be replaced. To replace the battery, remove the two screws and open the back cover.