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: 30Pcs/box x mosquito tablet Notes: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you