Garmin 010-10805-00 Astro DC 20 Wireless Collar Transmitter Shipped With Rugged, Durable, Neoprene Harness To Maintain Its Position In The Top, Middle Of The DogS Back/Neck Convenient And Easy To Use Harness Has Enclosed Pocket To Carry Dc 20 Safely And Securely Includes Collar Attachment Plate (Fits Most Standard 1-Inch E-Collars) Rugged Ipx7 Waterproof Standards