Special featuresBattery pack BL1055B, in boxBattery connection on the side of the jumper.Comfortable heating due to 4 heating elements, 1 on the stomach, 1 on the back and 2 on 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 selected setting.Heated undershirt made of thin and elastic material.Machine washable at a maximum of 30°C.Technical dataTumble dryer safe: Yes USB port (charging mobile device): 1 Colour: black Operating time low (BL1040/41B): 15:00 hoursPlatform: LXT / CXT Lining: Polyester (100%) Operating time medium (BL1040/41B): 07:00 hoursHeat settings: High/medium/low Voltage: 10.8-18 VOuter layer material: Polyester (100%) Operating time high (BL1040/41B): 03:30 hoursWashing instructions: 30 °C Documents Operating manual