Brand Name: PHMAX Material: POLYESTER Origin: Mainland China High-concerned chemical: None Capacity: 1800mah & Under Voltage: 3.8-5V Gear: 3 Rechargeble or not: Yes Suitable for season: Autumn & Winter Material: Polyester Style: Smart Heating Jacket Warm Gear: 45℃ Comfortable Gear: 35℃ Energy Saving Gear: 25℃ Feature 1: One key heating, three gear temperature control Feature 2: Machine washable, hand washable Note 1: Do not wring it by hand Note 2: Mobile power needs to be connected Note 3: Mobile power supply needs to be provided by yourself Choice: yes semi_Choice: yes