STB-18a a mechanical numeric keypad best quality USB/ps2 4/5000 Password keyboard

Please note that before buying, please choose your required interfaces, the USB or PS / 2 If there is no marked interface, we will random shipment a mechanical numeric keypad product description 1, the number of keys: 18 key shell material: plastic 2, key-press material: imported key core key life: more than 5 million times 3, keycap: laser engraving or silk screen keyboard interface, USB 4, working voltage: + 5 v 5, working current: < = 100 ma 6, size specifications: H34 W103 L140 * * MM