SDG 1/2 inch Biothane Check Cord Feature_DedicatedDogButtons Backward compatible so you can

Backward compatible so you can keep your existing collars and other Alpha® compatible devices

Rheostat/Volume Dial with 0-100 Stimulation Levels

22 caliber blank launching load

making it easy to clean and prevents birds from climbing

Dogtra E-Fence 3500 Add on Collar

SDG 1/2 inch Biothane Check Cord Feature_DedicatedDogButtons Backward compatible so you canThe SDG 1 2 inch Biothane Check Cord is a training lead made from Biothane a waterproof, easy to clean synthetic material that handles field conditions, mud, water, and repeated use without the rot, stiffness, and weight issues of traditional cotton or nylon rope check cords. The 1 2 inch width is the standard size for retriever training check cords heavy enough for control on medium to large breeds, light enough to run through the handler's hands