Features: The dog bark device emits harmless, 8-second effective ultrasound that is inble to humans but detectable by dogs, helping to control excessive barking from your own dog or a neighbor's dog. Safe and harmless for dogs. The anti-bark deterrent features a sleek and attractive design. Wall-mounted type for space-saving installation. This product uses a sound accumulation (integral circuit) triggering mode, meaning single barks or short ambient noises will not trigger it. Under normal conditions, it activates only after three or more consecutive barks. Made from premium materials for durability and long service life. Specifications: Condition: Housing Material: ABS Color: White Power Supply: 8-9V DC / 500mA Size: Approx. 13 x 7 x 5 cm / 5.12 x 2.75 x 1.97 in Package List: 1 x Barking Controller 1 x Power Plug 1 x User Manual All necessary accessories included Installation Steps: 1. Mount the unit on the wall at the only entry point for pets, in a location protected from rain, humidity, and direct sunlight. Install 40–50 cm above the ground. Align the wall panel with the mounting holes, drill accordingly, and secure the panel using screws and nuts. 2. Once the mounting hardware is installed, snap the bark deterrent unit into the wall bracket. Adjust the unit to a slight downward angle, ensuring the round sensor at the top and the speaker at the bottom are properly oriented. 3. Connect the power cord, route it through the cord opening on the bottom of the unit, and plug into a power source (ensure the location is protected from rain, moisture, and sunlight). Note: Please allow 1–3 cm variation due to manual measurement. Confirm you are comfortable with this before ordering. Actual product color may vary slightly from images due to lighting and screen settings.