The Miraculous Insecticide Chalk is a highly effective product used in destroying crawing insects and yet not toxic to humans. It is highly recommended in killing troublesome insects like cockroaches,ants,bed-bugs and lice.This Miraculous Chalk is a contact insecticide which attacks the nerve system of the insect immediately upon contacts.Consequently,the insect's nerve system will completely fail to function. It will die within one or two hours after any touch of the powder. Using Directions: DIRECTION FOR USE: 1.The chalk is more effective to use at night. 2.Draw several parallel lines each 2 to 3 cm apart across the track which the insect used to take or around the insect's hidden lying place. The insect will be killed instantly when it touches the powder of the chalk. 3.Draw 2 or 3 cirles around the feet of the food cabinet,the bait for the insects or the garbage pile. 4.The chalk will not produce pollution. Harmless to human being or animal.Just wah your hands with water after handling the chalk. 5.The chalk may be cut into several pieces before using. In drawing the lines, try to leave more powder on it so as to acquire better result. *** Warning : Keep away from Childern and Animals