Special characteristicsBattery pack BL1055B, in boxBattery connection on the side of the shirt.Comfortable heating by 4 heating elements, 1 on the stomach, 1 on the back and 2 at the wrists.Please read the safety instructions and operating manual carefully before use.Supplied adapter can also be used with our ventilated clothing.Preselection of three heating levels by button with LED indication of the chosen level.Heated undershirt made of thin and elastic material.Machine washable at a maximum of 30°C.Technical dataTumble dryer safe: Yes Operating time medium (BL1860B): 16 : 00 hoursOperating time low (BL1860B): 33 : 00 hoursUSB port (charging mobile device): 1 Colour: black Platform: LXT / CXT Operating time high (BL1860B): 07 : 30 hoursOperating time low (BL1040/41B): 15 : 00 hoursOperating time medium (BL1460B): 10 : 30 hoursLining: Polyester (100%) Operating time high (BL1460B): 05 : 30 hoursOperating time medium (BL1040/41B): 07 : 00 hoursHeat settings: High/medium/low Volts (voltage): 10.8-18 VOuter material: Polyester (100%) Operating time high (BL1040/41B): 03 : 30 hoursOperating time low (BL1460B): 23 : 00 hoursWashing instructions: 30 °C Documents Operating manual