Lot of 3 used mechanical keyboards (AULA F68 model F68 S/N: WKF68IA230400776, LTC Neon75 model Neon75 S/N: 2203-N75-00642, and YK75) in fully functional condition, showing minor cosmetic signs of use including light scuffs on casings and specific wear on the number "2" keycap of the AULA F68 keyboard as clearly shown in photos. All keys and backlighting operate perfectly via USB or Bluetooth according to each unit's specifications. Please note that the AULA F68 and YK75 models originally came with 2.4G wireless USB receivers which are now missing. The LTC Neon75 model is designed exclusively for Bluetooth or wired connection and never included a 2.4G receiver. Despite the missing adapters, all three keyboards function perfectly via Bluetooth or standard wired USB connection. Sale includes only the 3 keyboards; no cables, wireless USB receivers, or accessories are included.