SEAMLESS DESIGN: The 1900S BLACKs ergonomic receiver is sleek and slim, which allows the strap to wrap around the receiver and your dogs neck seamlessly. This versatile system comes with a premium matte black finish and blue LED lights for enhanced tactical fit and aesthetics to excel in the most demanding training conditions whether for indoor or outdoor activities. IPX9K WATERPROOF CERTIFIED: The 1900S BLACK come with a durable receiver that is IPX9K waterproof certified, which means it has passed the International Protection Marking system. Products are verified if they can withstand a close-range high-pressure liquid spray from 4 angles (pressure of 80-100 bars and a temperature of 176F). 1-MILE RANGE: The range of this training e-collar is perfect for simple to complex training commands for your dog. The 1900S BLACK is a 1-mile, single-dog version of our bestselling 1900S e-collar is perfect for serious obedience, hunting, and K-9 training. PRECISE CONTROL: With 127 correction levels to choose from, youll have no problem finding the perfect level for your dog with gradual and precise control. The LCD screen is bright and easy to read while the levels can be adjusted precisely at any time with the Rheostat Dial. CORRECTIONS: This e-collar has two different correction types. The first correction type is a Nick (quick -second) and the second correction type is a Constant (up to 12 seconds). The e-collar also has a HPP (High Performance Pager) which offers a clear vibration to alert dogs while training. Find the right fit for you and your dog with this dynamic e-collar. The Dogtra 1900S BLACK EDITION is the 1-mile, single-dog version of our bestselling 1900S e-collar, known for its versatility and IPX9K durability, making it the tool of choice for trainers in extreme conditions at extreme ranges. The 1900S BLACK EDITION's receiver is also IPX9K waterproof certified, the highest heat and waterproof level. With its longer range and proven durability, the Dogtra 1900S BLACK EDITION comes with a premium black matte finish and blue LED lights for enhanced tactical fit and aesthetics to excel in the most demanding training conditions for competition or K9 training.