The Dogtra Element 1/2-Mile Training Collar has all the basic components needed for successful behavior management of your dog. The amazing durability and vast array of features make this Dogtra Collar an excellent choice for any hunter or sport dog trainer. The easy-to-use Dogtra Collar features an ergonomic water-resistant transmitter. With a rheostat dial, this training collar allows for a gradual increase in stimulation intensity with no jumps between levels. The Dogtra Element 1/2 Mile Remote Trainer comes with rechargeable Ni-MH Batteries in a one-charger system that allows the transmitter and receiver to be charged at the same time. The LED battery life indicator makes it easy to see the status of the battery. This Dogtra Element 1/2-Mile Training Collar is designed for mild mannered dogs that do not require a high level of stimulation. This training collar is not intended for use on dogs weighting less than 12 pounds or under 6 months of age. Dogtra Element 1/2-Mile Training Collar: * Designed for mild mannered dogs * Precise stimulation level (0-100) * Reduced receiver/collar designed for smaller dogs * 1/2-mile range * Constant and non-stimulating pager * Rechargeable, user-replaceable Ni-MH batteries * Fully waterproof collar/receiver and transmitter * LED battery life indicator * Model# 300M