If you are concerned about personal privacy in various environments, this product can help address those concerns. Lightweight and portable, it efficiently detects wireless signals to assist in identifying potential privacy issues. Features: - Effective detection: Capable of detecting signals in the 100-2400 MHz range up to 32.8 inches away. Provides 360-degree coverage with no blind spots to help protect personal privacy. - Wide application: Suitable for use in hotels, restaurants, restrooms, changing rooms, business meetings, contract signings, and other locations where unauthorized devices may be present. - Reliable performance: Designed for accuracy and consistent operation. - Simple operation: Easy to use—extend the antenna, press button A for long-distance scanning, and button B for short-distance 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 0.7cm / 2.3 x 1.5 x 0.3in - Packing Size: Approx. 12 x 8 x 3cm / 4.7 x 3.3 x 1.1in - Antenna Length: Extendable up to 16cm / 6.2in - Detection Band: 100-2400MHz - Working Range: 1m / 39.4in - Working Voltage: 1.5V - Battery: 12V/23A (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-distance search. When radio waves are detected, the indicator light will flash and an ble alert will sound, helping identify the signal source. 3. Press and hold button B for short-distance scanning. The device will emit sound and flash when a signal is detected. 4. During short-distance search, if interference occurs beyond 2 meters, adjust the antenna length accordingly. Note: The device uses a 12V/23A battery, which is replaceable. To replace the battery, remove the two screws and open the back cover.