<p><i><b>This amazing hand held ultrasonic bark devices with a safe and pet friendly way to correct unwanted barking behavior!</b></i></p> <p>With the push of a button it emits an ultrasonic sound only your dog can hear; one that deters barking quickly and effectively.</p> <p>Specific：</p> <p>Material:ABS</p> <p>Weight: 1.1oz(32g)</p> <p>Color: Dark Grey</p> <p>Sound frequency：25KHZ</p> <p>Power source: 4 * AAA batteries</p> <p>Maximum control distance: 16.4ft</p> <p>Device Size: 3.7'' x 1.6'' x 1.2''</p> <p>Package content:</p> <p>1* hand held ultrasonic bark control; </p> <p>4* AAA batteries; </p> <p>1* anti-static wrist strap;</p> <p>1* user manual</p> <p>Notice</p> <p>* The actual color may vary slightly from the online image due to monitor color settings.</p> <p>* Please allow slight measurement deviation for the data.</p> <p>Our Service:</p> <p>1. We will reply you in 24 hours. </p> <p>2. After sending, we will track the products for you once every two days, until you get the products. </p> <p>When you got the goods, test them, and give me a feedback.</p> <p>If you have any questions about the problem, contact with us, we will offer the solve way for you. </p>