Product information:―Material: Polyester + Cotton―Fever Area: There are 8 heaters in 5 areas: calf, thighs, knees, hips, and abdomen.―Bluetooth type: When connected to the Bluetooth of the mobile phone, the temperature can be adjusted on the mobile phone and it is convenient to turn it on / off.―Power supply: USB type (5V / 2.0A or higher is required!)--Usage time: 10h / 9h / 8h / 7h / 6h can be used continuously from the lowest temperature to the highest temperature with a 15000mAh battery.--Color: Gray (Unisex with elastic waist)--How to use: Press and hold the switch for about 3 seconds to turn it "on", press and hold it for about 1 second to adjust the temperature steps in order, and press and hold it for about 3 seconds to turn it "off".--Note: Mobile battery is sold separately.--Temperature control: 5 steps (sky blue / 45 ° C, purple / 50 ° C, dark blue / 55 ° C, green / 60 ° C, red / 65 ° C)When using 15000mAh mobile battery--High: Approximately 5.5-6 hours 65 ℃--Medium and high: Approximately 6-7 hours 60 ℃--Medium: Approximately 7-8 hours 55 ℃--Medium and low: Approximately 8-9 hours 50 ℃--Low: Approximately 9-10 hours 45 ℃Package contents:1 × Electric heating pants1 × Instruction manual1 × Dedicated laundry bag (Please put in the dedicated laundry bag and wash)