>Built-in light dependent resistor(LDR) for anti tamper
>Backlit keypad,can set automatic OFF after 20 seconds
>Bluetooth function or Big user capacitive for optional
H3-S is a standalone TOUCH keypad access control with doorbell. It supports up to 990 common users + 10 visitor users, also supports
multi access modes in card access, PIN access, card+PIN access, or multi cards/PINs access.