100-yard range e-collar that supports training 1 dog Choose to train with vibration (buzz), tone (beep), or 8 levels of static simulation Waterproof and submersible to 25 feet using DryTek technology Lithium ion, rechargeable batteries feature a 2-hour quick charge, and a low battery indicator lets you know when to charge Fits dogs 8 pounds or larger with neck sizes 5" - 22" By designing our products in the field, with heat, cold, rain, snow, dust, mud, and wind in mind, SportDOG has become the most recognized brand in the electronic tracking and training categories, making the promise to always create "Gear The Way You'd Design It"