12 in. x 16 in. power pet large electronic fully automatic dog and cat electric with or without a transformer, this product is not recommended for use outside the us. For pets up to 100 lbs. The seller is gianthomesupplies7 and is located in Whitestone, New York. New water-resistant collar operates for months on a single lithium battery and ultrasonic operation will not interfere with or be affected by other electronic devices.