A. This link mainly provides the switches and keycaps of mechanical keyboards. B. It is generally suitable for SMD LEDs and not suitable for switch LEDs. All Box switches in the inventory are of a new version and are less likely to damage GMK keycaps. - It is compatible with 2x3x4mm LEDs and 1.8mm LEDs. Usually, you need to solder the LEDs to the PCB first and then solder the switches. Even if you solder the LEDs first, 3mm round LEDs are typically not usable. C. The service life of this switch is approximately 80 million presses, which is longer than that of common switches. D. This switch has an IP56 - level waterproof and dust - proof function. It uses 18K gold contact technology, which can make the pressing feel better. - The Box Navy switch is a clicky tactile switch. The spring pressure is similar to that of the heavy light blue switch, and the tactile feedback is relatively obvious. - The Box Jade switch is a clicky tactile switch. The spring pressure is similar to that of the Box White switch, and there is a bit of resistance in the tactile feedback.