Introducing ARC-X. Designed 30% slimmer than the 1900X, with Dogtra's proprietary ergo curve that contours naturally to your dog. At just 2.75 oz, it's so light your dog will forget it's there. Advanced XPP vibration, audible tone, and brightest LED. 3/4-mile range, expandable to 3 dogs. Completely waterproof. Training, reimagined. Features Slim Fit Profile Central Command Button LED E-Collar Light Audible Tone 3-Dog Expandable Boost & Level Lock Compatible with Handsfree Squares Durable Double Remote Casing Nick, Continuous & XPP Vibration 3/4 Mile Range 100 Medium Output Levels IPX9K Waterproof Package Contents 5/8" Contact Points Male E-Collar Remote Transmitter E-Collar Receiver 3/4"wide X 28" Long E-Collar Strap 5V 2.5A Charger USB-C Charging Cable Test Light Belt Clip Lanyard Specifications Receiver Weight: 2.75 oz Transmitter Weight: 5.2 oz Transmitter Dimensions: 3.9"x2.1"x1.3" 1"wide X 31" Long E-Collar Strap Minimum dog weight: 15lbs