1.Digital keypad ,stand alone type.Digital keypad reader 2.Stainless steel buttons with water proof design. 1.Stainless steel buttons with water proof design,2.Built-in doorbell button(110V/3A)3.Extra large BAR indicator lights.4.Optional SC-300 plate to use with socket box.5.Read range 10-15cm.6.Digital keypad reader ,stand alone type.