Trimble Catalyst DA1 Antenna Kit, Includes: Trimble Catalyst DA1 antenna, battery, battery holder and pouch, The antenna attaches with a simple push-fit to any 1 1/4 inch diameter pole or rod, or can be securely attached to any accessory with a standard with a 5/8 inch thread using the simple threaded adapter that comes in the box. Your antenna also ships with an external USB battery pack, custom battery mount, and a protective carry pouch.