Powerful o Listening Device with Foldable Ear Amplifier for Wall and Door Sound Detection – Includes Earphone (Black) This multi-functional listening device is designed for sound detection through various surfaces: 1. Suitable for use on wooden walls, walls, doors, windows, and wall panels to capture o. 2. Features a high-sensitivity sound detector that enhances voice clarity from adjacent rooms. 3. Comes with stereo headphones and an o output jack, allowing connection to external recording devices for o documentation. 4. Ideal for general monitoring applications in business or informational contexts. Package includes: - Main listening device: compact, jelly-sized unit in black, equipped with charging port, headphone jack, volume control switch, and bottom-mounted sound sensor (place against walls, doors, or panels for optimal performance) - High-definition stereo headphones - Charging cable and packaging box Usage instructions: Charge the device fully before first use. Insert the headphones, place the sensor end firmly against the desired surface, turn on the device, and adjust the volume control until clear o is heard. For extended recording, connect an external recorder to the o output jack. Note: Due to differences in lighting and screen settings, the product color may vary slightly from images. Slight dimensional variations may occur due to manual measurement.