The CR7 receiver for cats has 7 user-adjustable levels and a battery life of up to 6 months. Includes: Status Light, AutoMemory® and TattleTale®. Weighs 1.1 ounces (with battery.) Includes 1 battery (3.0 volt lithium), 1 collar strap (⅝” black cat safety-strap - adjusts 5½” to 8”), 2 standard contact posts, and attachment accessories. Designed to work with the CAT200 Indoor Boundary, but will work with all DogWatch FM transmitters, indoors and outdoors.