windproof and water resistant. Lightweight material. Perforated fabric around armhole. Full length front zipper. Breast pocket with vertical zipper. Two front pockets with zipper. Elastic at the bottom, sleeve holes and collar. LED cable from front to back. Lithium battery zippered pocket (included) on the back. The control unit has 4 light states, low, medium, max and flashing. Operating mode on a fully charged battery is up to 12 hours when medium intensity of light is used. The operating temperature range of the unit is between -15 ° C to +40 ° C. At lower temperatures than -15 ° C, capacity decreases significantly and at temperatures above 40 ° C turns off the device automatically. For charging we recommend travel adaptor micro USB, 131967. Is large in size, so choose a size smaller. Authorized according to EN ISO 20471 at 2nd