Features: High quality pet dog repeller with both lovely shape and comfortable hand feeling. It produces 125dB powerful ultrasonic (inaudible human ear) and 2800MCD strong white light, which can cause strong stimulation to dogs and cats. Effectively barnish dogs and cats without hurting them. Dog trainers can effectively let your dogs to be obedient and stop some unwanted behaviors. Premium material, good wear resistance for durability. Simple operation, compact and portable size, great to take along while walking, jogging, cycling etc. Specifications: Condition: Brand New Material: ABS plastic Color: Black Ultrasonic: 125dB Battery: 9V battery(excluded) Size: Approx.11.4*4*2.8cm(L*W*H)/4.5*1.6*1.1in Package Weight: Approx.76g/2.7oz Maximum Drive Range: 20m / 65.6ft The effect of repelling dogs is not good under the following conditions: 1. Your dog, because it knows that its owner will not harm it; 2. Noisy environment, such as downtown area or roadside; 3. Dogs with their owners; large trained dogs; 4. When the battery voltage is too low-the transmitting power is low. The above situation will not affect the use effect of this product, because dogs who often go shopping, dogs with their owners and well-trained dogs will not bite people. Package List: 1 * Ultrasonic Dog Repeller Features High-Quality Pet Dog Repeller: Designed with a lovely shape and comfortable hand feeling, this pet dog repeller is made with premium materials for durability and reliability. Powerful Ultrasonic and Strong White Light: With a 125dB ultrasonic sound (inaudible to humans) and 2800MCD strong white light, this device provides a powerful and stimulating deterrent for dogs and cats. Safe and Harmless Repellent: Effectively banish dogs and cats without causing any harm or discomfort to them, ensuring a humane approach to training and control. Obedience Training Tool: Professional dog trainers can use this device to effectively teach dogs obedience and discourage unwanted behaviors for a well-behaved pet. Compact and Portable: With its simple operation and compact size, this device is easy to carry along while walking, jogging, cycling, and more, providing convenience and versatility.