This item is highly recommended by the SatPro staff.
The HotShot Arm Heater warms the LNBF support arm to assist in prevention of snow buildup. Snow piling up on the LNBF support arm can reduce the signal path enough to interfere with TV reception even if your dish has a HotShot Satellite Dish Heater on the reflector. We highly recommend this accessory in northern climate areas where the dish elevation angle is low to the horizon and the LNBF support arm is flat enough (horizontal) to allow snow accumulation on the support arm.
HotShot Satellite Dish Heaters have one accessory plug on the blanket and the HS14ARM plugs directly into the provided socket connection on you HotShot.