The LTP-1457AKD is a 1.2 inch (30.42 mm) matrix height 5×7 dot matrix displays. This device utilizes AlInGaP Hyper Red LED chips, which are made from AlInGaP on a non-transparent GaAs substrate, and has a gray face and white dot color. DEVICE PART NO. AlInGaP HYPER RED LTP-1457AKD DESCRIPTION ANOD.