The SportDOG Brand YardTrainer 300 lets you stretch obedience training and recreational opportunities with your active dog. At home, in the yard, or out at the park, you are in control all the way out to 300 yards. Offers premium features at a value price. It is not only compact, but also has features typically found on more expensive field models including: a long-life rechargeable battery, seven levels of static stimulation, easily accessible vibration and tone stimulation options, and DryTek technology allowing the system to be waterproof and submersible to 25 feet. Like all SportDOG products, operation is intuitive.