A unique blend of common sense engineering, ultra-compactible design and careful craftsmanship. Key technical features that make an Aerostich vest your best choice: A slightly shorter, thinner heated collar that fits your neck better and slides under a jacket collar with less bunching. A longer trunk length giving a greater total heated area. Only two pockets: one for storing the power cord and one that the entire vest pulls into, forming a neat, compact package. Includes: fused, lighted coil cord hookup and power switch. 45 watts / 3.3 amps (works with all BMW standard power outlets). Specify QuiConnect 2, SAE or BMW connectors.