Special characteristicsBattery pack BL1055B, in boxBattery connection on the side of the jumper.Comfortable heating from 4 heating elements: 1 on the abdomen, 1 on the back and 2 at the wrists.Read the safety instructions and user manual carefully before use.Supplied adapter can also be used with our ventilated clothing.Three heat settings pre-selected by a 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 °C Operating time low (BL1040/41B): 15 : 00 hoursPlatform: LXT / CXT Outer material: Polyester (100%) Lining: Polyester (100%) Heat settings: High/medium/low Operating time high (BL1040/41B): 03 : 30 hoursColor: black USB port (charging mobile device): 1 Tumble drying: Yes Volts (voltage): 10.8-18 VOperating time medium (BL1040/41B): 07 : 00 hours Documents User manual