<p><b>Specification</b>: </p> <p>Size: 61.5 x 34.5 x 32mm;</p> <p>Light weight: 100g</p> <p>Power: 3.7V </p> <p>rechargeable battery Includes:</p> <ul> <li> 1*bark spray device</li> </ul> <ul> <li>1*built-in 3.7V rechargeable battery </li> </ul> <ul> <li> 2*adjustable nylon strap Spray (black and green)</li> </ul> <p><b><i> Refill for Spray Bark colla,you need to buy one separately.</i></b></p> <p> <b>On/Off Button about the Product</b>： </p> <p>1.Product is turned on, holding down for about 3-5 seconds, you will hear 2 beep beeps in a row, and the green light flashes 2 times in a row. </p> <p>2.Produc shuts down, holding down for about 3-5 seconds, while the green light will always light up and you will hear a long beep. （When the red light flash, the number of sprays after opening is displayed） You can also gently blow the Microphone to test whether the machine is working properly while the dog is barking. Hold the tank on a solid surface with the refill nozzle facing upward.Hold</p>