21 in. double heated stadium seats are heated by USB power supply and can be used with any USB battery for several hours. 3-levels control the heating temperature: High, Medium and Low. The heated folding chair can be heated to a maximum of 140 °F. With 6 different reclining adjustments, allowing you to choose according to your needs. The armrests are also adjustable. Our stadium seating for bleachers with multiple pockets where you can conveniently store your bottles, snacks, and personal items. With 2-shoulder straps, it can be easily carried like a backpack. This means you can take it anywhere you go. Best choice for any outdoor activity, picnic, camping and a fishing trip. Color: 2-Pack/ Wide 21 in.