Tinksky Insect Mosquito Repeller Outdoor Solar Powered with Compass Material: durable hard ABS plastic. Eco-friendly, non-toxic sonic mosquito repeller. Solar powered, no batteries needed. Repel mosquitoes by sound wave, and protect you from mosquitoes and insects, etc. Can be clipped on your clothes, bag, bed and table with the hook. Built-in compass for assisting you to identify directions in outdoors.