The D.T. Systems Master Retriever 1100 E-Collar Dog-Training Collar gives hunters effective dog-training ability up to 1,100 yds. away without a lot of hassle. Able to accommodate up to three dogs (with Add-On Collars, sold separately), this expandable training system offers 16 intensity levels of Gentle Touch nick and continuous stimulation. This wide intensity range and the systems Vibration Assist no-shock option help you match the training to your dogs personality. Rechargeable, waterproof collar features rechargeable NiMH battery and Maxx-Range 360 internal collar antenna to pull in clear signals from any direction up to 1,100 yds. away. Weighing just 4.7 oz., the tough and durable nylon collar adjusts from 7 to 22 in 0.5 increments to fit a wide range of dogs. Waterproof transmitter uses one 9-volt battery (not included). Built in magnetic on/off system. Manufacturers limited lifetime warranty. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Training Collars.