Features:
Built-in hardware watchdog, real time clock, arming, force alarm, door close delay alarm, doorbell, and
duress code & output.
- Built-in door auto open time zone, holiday edit, door group & time setting. With multi-door control panel,
 - support more time and group sets.
 - Standalone/Networking/Support Cascade Structure.
 - Support RS485 communication encryption.
 - Multiple access mode: card only, card or password, card, and password.
 - Multi output: door lock output (0.1-600 sec. and toggle mode) & alarm output (1-600 sec.).
 - Silent operation mode: push button mute and all mute.
 - Auto relock for anti-trailing and sneaking.
 - Access control, lift control, time attendance, payroll and SCADA: graphic monitoring & remote control function.
 
- Model: AL721HDR
 - Communication interface:
- Host: Rs485/ 9600 bps (N, 8, 1).
- Serial: UART PORT (Output only)/ 4800 bps (N, 8, 1). - Frequency: 13.56MHz.
 - Supported tags: 1. ISO14443 Mifare ultralight, Classic, DESFire EV1; 2. NFC (card simulation).
 - FRID Reading range: 2-8 cm.
 - Input: Egress/ Door state/ Door Bell (use keypad#).
 - Output:
- Door lock relay/ Alarm relay.
- Door bell output (common alarm PIN)/ Arming output/ Security Trigger Output/ Duress Output. - Floors number: 32 Floors.
 - User capacity: 1024.
 - Event log: 1200.
 - LED: 
- Bi-Color LED Ring Indicator.
- GREEN: arming, disarming/standby mode & access granted.
- RED: abnormal event: access denied & alarming. - Buzzer: 1
 - Extend port: Tamper switch/ Tamper output/ Wiegand IN.
 - Dimension (mm): 111 (H) x 77 (W) x 26 (D).
 - Material: Housing: ABS, Keypad: Rubber.
 - Color: Gray.
 - Weight: 100±10.
 - Power consumption: <3W.
 - Power voltage: 9 - 24 VDC.
 - Operating temperature: -20°C ~ +65°C.
 - Storage temperature: -25°C ~ +70°C.
 - Operating humidity: 20% ~ 90%.
 - Storage humidity: 5% ~ 95%.