High Tech Pet Sofa Scram Sonic Dog & Cat Deterrent Repellent Mat Gets pets off furniture fast Emits a startling 85 decibel beep Instantly activated by the touch of a paw,works on cats and dogs weighing more then 5 pounds. Use on chairs, counter tops, beds, in front of doorways, trash cans and the sofa. Requires one 9 volts alkaline battery (not included).