Power Blanket Ice Chest Cooling Details Modified cooler box, with pump, filled with ice and water32°F min temp (lower temps with use of salt or other freeze point modifiers)Use with or witho... Details Back Modified cooler box, with pump, filled with ice and water32°F min temp (lower temps with use of salt or other freeze point modifiers)Use with or without controller (controller can control circulation only40 lbs of ice can maintain 55°F for 9-10 hours in 100+°F ambient temperatures