The 5807 Series are 0.4mm pitch Board to Board Connectors featuring a width of 1.9mm, which is reduced by 20% compared with our conventional products. The stacking height between boards is only 0.7mm when mating the plug and receptacle connectors, thus contributing to space-saving and downsizing of the products to which they are applied. The bottom surfaces of the connectors are insulated and avoid exposure of contacts, thus enabling flexible designs on printed circuit boards.