Product Intruction: Electric mosquito mat is manufactured by applying latest and eco-friendly materials. This is an efficient anti-mosquito product.Protecting whole family. Directions for use: 1.The electric mosquito repeller horizontally, then insert one piece of mat in the repeller. 2.Plug electric mosquito repeller into the electric outlet. 3.Open windows or open door while use for better ventilation. 4.Charge new mat when its color completely changes from blue to white or charge mat every 12 hours. Package includes: 30pcs mosquito coils Note: 1.Due to the different monitor and light effect, the actual color of the item might be slightly different from the color which is showed on the pictures. 2.Please forgive 1 cm/0.39"-3 cm/1.18" measuring deviation due to manual measurement.