With the Chameleon® Multibrand Extender, you can have one brick collar and have the utility of two bricks. You can have more than one positive and negative contact point. Additionally, with the Chameleon® Extender, you can move your contacts and change the number of contacts to have optimal contact and best sensitivity for your dog. You can move the contact points as frequently as necessary to eliminate possibility of necrosis. Additionally, you can use the Chameleon® Feather Contacts which are compatible with the Chameleon® Extenders (and all Chameleon® collars) and give the best contact with flexible comfort. • The medium size (26,5 cm) has one central island in the center and 2 islands on either size, each of which can accommodate up to 3 contact points/plastic screws, and the end island that can support 2 contact points/plastic screws . • The large size (31 cm) has one central island in the center and 3 islands on either size, each of which can accommodate up to 3 contact points/plastic screws, and the end island that can support 2 contact points/plastic screws . The CEMB® is compatible with: Martin System Dogtra Dog Trace E-Collar Technologies Garmin Sit Means Sit Sport Dog
