Enough to Use: the package comprises 4 automatic fly sprayer, this pack ensures that you have a spare dispenser at your disposal so that while one is in use, others can as a backup; Please avoid exposing the product to high temperatures or exposure to the sun, which may cause the battery to and damage the product. Easy Controls: this automatic fly dispenser is simple and straightforward to operate, just place the you need, turn on the switch, select the interval, and you are ready to use. Compatible with Multiple Refill: in addition as barn fly control, you can also use other perfumes, and most dosages of sprays are acceptable, providing more convenience for your . How to Use: you need to prepare 2xAAA batteries (not included in the package), the metered fly offers a seamless setup process, they have been designed to deliver maximum efficiency, keeping long lasting effects. Applicable Scenes: this country vet fly is suitable for summer barns, farms, stables, dairies, chicken coops and kennels, protecting your animals with a 15 minute interval setting, killing mosquitoes and small moths. Color: White Material: plastic Size:19x8cm Package Contents: 4 x Automatic Air Freshener Dispenser Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.