Specifications: Material: Aluminum and ABS plastic Built-in battery: 1.2V / 600mAh Sound frequency: 400Hz< /p> Effective coverage: 650 m² Features: - Safe and chemical free. < p>- corrosion resistant aluminum. - Solar powered and Christmasextra battery needed. - Waterproof, don’t worry about extreme weather conditions. < p>- Christmasharm to your pet. Package contains: 2 x Solar Mole Repeller < p>1 x User Manual