Multi access modes: Card, Card or PIN, Card with PIN and multi Cards/PINs Can connect with any reader with Wiegand 26~37 bits input Can connect with any keypad reader with 4bits, 8bits (ASCII), or 10bits Virtual Support Master Card function Support set principal card 12V DC power input One relay, 1000 users Wiegand 26~44, 56, 58bits input Can connect with external alarm and door contact 500 APP users for iOS and Android available Add / Delete users by APP ( Card users available only) Can set Time Restriction for users Temporary Password (One-time Or Period Code) Support checking Opening Record Remotely Access (Support 3G/4G/5G) Doorbell Call Notice (Support External Door Bell) Material: Metal colour: Black Package Contents: 4 x TUYA wifi Mini Controller 4 x Remote Controler 4 x English instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.