The 2300NCP Advanced 3/4 Mile Remote Trainer is a true multipurpose e-collar designed for advanced level pet training, competition field work or any type of hunting especially where a 3/4-mile range is needed. It has a rheostat dial allows for gradual increases in stimulation intensity with no jumps between levels (0-127) and uses Nick , Constant for the stimulation type with a nonstimulating pager/vibration which the owner can set depending on the type of training that they would want to have. The transmitter has a blue LCD screen that displays exact level of stimulation and can be seen in the dark or low light conditions with a three bar battery life indicator and LED colored indicator to show remaining battery life. Both collar/receiver and transmitter are fully waterproof and uses a rechargeable 2-hour rapid charge Lithium Polymer battery. This unit allows you to train up to 1 dogs.