The 1902S features a 3/4-mile range that allows you to cover more distance when training demands it and 2-hour rapid charge batteries to get you up and running in the shortest amount of time possible. The set is fully waterproof and the LCD on the handheld transmitter displays the battery life and stimulation level. The 1902S is a high powered unit and includes a non-stimulating High Performance Pager. Features: Slim design receiver/collar The 1902S is a versatile e-collar made for pet, K-9, and sport dog training where high output is required. Fully waterproof Checkered grips on the handheld transmitter 'Nick' and 'Constant' stimulation along with the High Performance Pager Enhanced contact points Precise stimulation level (0-127) 3/4 mile range Rechargeable 2-hour rapid charge Lithium Polymer batteries Low to high power stimulation Fully waterproof transmitter and receiver/collar LCD screen displays exact level of stimulation even in dark or low light conditions Water excelling enhanced contact points Dogtra 3/4 Mile Dog Remote Trainer - 2 Dogs from EntirelyPets.