Ultrasonic repeller uses the advanced technology, which can produce frequency conversion ultrasonic wave to affect auditory and nervous system of mice, mosquitoes, cockroaches and other pests and cause neurological disorder, loss of inappetence and mental fatigue, thus fleeing the scene. It also features aromatheraphy and atomization function, making it pretty practical to use. Protect your family from pest nuisances! Note: 1. Pests may be active and disorderly about 3-5 days after use, it's normal and you can see obvious effect after 2-3 weeks. Allow the Pest Repeller to operate continuously for best results. 2. Size and color may be slight different beacuse of manual measurement and different light conditions, please in kind prevail. Thank you. Specifications: Color: Black/ White (Optional) Material: ABS ' PP Rated Power: 5W Built-in Battery: 1 * 3.7V 200mAh Polymer Lithium Battery Tank Capacity: 12.5ml (continuous spary for about 12min) Ultrasonic Frenquency Band: 80Hz-125KHz (16 band intelligent frequency conversion) Item Size: 6 * 3 * 7cm / 2.4 * 1.2 * 2.8in Item Weight: 36.5g / 1.3oz Package Size: 7.5 * 6.5 * 3cm / 3.0 * 2.6 * 1.2in Package Weight: 80g / 2.8oz Package List: 1 * Ultrasonic Spray Mosquito Repellent 1 * USB Cable 1 * Liquid Dropper 1 * User Manual (English)