Instructions 1.The five grooves must be full with bait and confirm the amount of inducer will not overflow 2.The product needs to be placed in where the flies are often appearing 3.If the fly is not interested in the inducer, you can add some vinegar or sugar, fish smell things which can catch the flies 4.The fly trap box can be added some soapy water, to quicken the flies to die, normally, open the fly trap box to clean it after 2-3 days Feature: High-quality plastic material, non-toxic and safe Anti-shock and crush resistant Easy to use Smart appearance Powered by USB cable ( included ) Package included: 1 x Fly Trap Device 1 x USB Cable