Special featuresBattery pack BL1055B, in boxBattery connection on the side of the shirt.Comfortable heating thanks to 4 heating elements, 1 on the abdomen, 1 on the back and 2 at the wrists.Read the safety instructions and operating manual carefully before use.Supplied adapter can also be used with our ventilated clothing.Preselection of three heating settings via button with LED indication of the chosen setting.Heated undershirt made of thin and elastic material.Machine washable at a maximum of 30°C.Technical dataWashing instructions: 30 °CRuntime medium (BL1040/41B): 07 : 00 hoursPlatform: LXT / CXTRuntime low (BL1040/41B): 15 : 00 hoursOuter layer material: Polyester (100%)Heat settings: High/medium/lowTumble dry: YesUSB port (charging mobile device): 1Colour: blackVoltage: 10.8-18 VLining: Polyester (100%)Runtime high (BL1040/41B): 03 : 30 hoursDocumentsUser manual