... Automatic alarm or alert system, to alert pets not to enter the forbidden area.7. The product ... , in the lightest design, 36g weight, will not affect pets’ living when it is put on.10. Programming system, in ... , you can set it to allow one pet enter an area, while another is not allowed.11. According ... is used with 3pcs “AA” alkali batteries (not included), and the receiver is used with 2pcs CR2032 ...