Model No: SWT-J01 Products Features 1. High Capacity Lithium Battery operated. 2. Lithium Battery rechargeable at 300 cycles 3. Far infrared Carbon Fiber Heating 4. Provide up to 2~3 hours heating time ! 5. 100V ~ 240V AC Universal Adapter/Charger 6. Jacket is with waterproof and windproof shell and Fleece liner. 7. 3 temperature settings : Low, Medium, High.