... replace 3.travel hotel use 4.CE, RoHS certificates Door Alarm SpecificationsMaterial:ABS plastic, electronic componentsDimensions:138 x ... includedVoltage:6VSpecial Feature:cheap, good quality, travel useProduct Usage:house door, hotel doorExport Market:USA, Europe, Latin America, Africa, ... not included). Simply place the pressure-sensitive Door Alarm at the base of any door, and the device will emit a ...