The 1902NCP is designed for eXtreme training situations. The 1902NCP sets the standard for eXtreme versatility and performance in the e-collar industry. The unit is fully waterproof. Boasts about 500m range. 127 levels of nick and continuous stimulation. A non-stimulating pager/vibration feature. A rheostat dial, allowing for gradual adjustment of stimulation. Transmitter has an LCD window that displays the intensity level along with a three bar battery life indicator. Receiver features antimicrobial plastic casing and surgical stainless steel contact points to minimize irritation to the dog's skin. Includes quick charge batteries, belt clip and lanyard.We use these for our training our dogs off leash.