The High Tech Pet Digital Waterproof Ultrasonic Dog Collar for All Power Pet Doors features a state of the art design that provides a strong signal and maintains accuracy over all temperature ranges. This state of the art dog collar is extra rugged, so it won't get damaged during your dog's ruffhousing. With a robust, fully enclosed ultrasonic transducer speaker, it is immiscible to 6 ft. and although we don't recommend immersing your dog in 6 ft. of water without scuba gear, the collar will stay high and dry! The training collar uses our specially designed B-3V1A battery which lasts about 3 months and prevents damage to the circuitry if the battery is installed incorrectly.Note: This product may require up to 2 additional days for order processing prior to shipping