A bracelet (100) for use during escape in the event of fire, comprising a housing (110) attached to a strap (120) where the housing (110) is pressed against the wrist when the strap (120) is tightened, and where the housing (110) comprises control electronics for warning by sound- and light units, and where the bracelet (100) comprises a device in the housing (110) which is connected to control electronics in order to detect whether the bracelet (100) is in motion or not, and means for controlling transmission of sound and light on the basis of said detection, and an attachment mechanism for the strap (120) to the housing (110) comprising means for activating the bracelet (100) when the strap (120) is tightened round the wrist.