This is an electronic dog training system with a working range of up to 275M. This compact, easy to operate system will control bad behavior and dogs that run off when taken outdoors for exercise. Featuring an easy to use vibration and static impulses. Is your dog out of control? Are you finding it difficult to train him/her using orthodox methods? You are not alone. Many dogs simply do not respond to traditional training methods which is why thousands of owners and professional trainers have used Petzip to assist them in their training programs. As we all know an out-of-control dog can be a danger to themselves and others. Petzip can help you achieve a well trained and contented dog within days. Specification - Collar Length: 43mm Height: 68mm Width: 38mm. Weight 110 g (module + battery ) Collar length adjustable from 20 to 50cm Power:2* 1.5V AAA battery Water resistant and shockproof. Specification- Handset Length: 120mm Height: 25mm Width: 45mm. LED signal light and illumination at night The sound function for attracting attention Water Resistant