The High Tech Pet B-3V1A Battery for MS-4 ultrasonic transmitter collars powers a collar for approximately 5 months. The Battery is designed for use only with MS-4 ultrasonic collar which powers the high tech pet power pet electronic fully automatic pet door, the yard barrier and the sound barrier.

The High Tech Pet B-3V1A Battery for MS-4 ultrasonic transmitter collars powers a collar for approximately 5 months. The Battery is designed for use only with MS-4 ultrasonic collar which powers the high tech pet power pet electronic fully automatic pet door, the yard barrier and the sound barrier.