It's the Mifare1 card reader with keypad for the access control system. Dimension: 108mm*88mm*26mm Color: White Frequency: 13.56 MHz Read Range: up to 6 cm Maximum cable distance to controller: 100 m Cable type: 8 wires shielded cable, 22 AWG Output Interface: 26 bits Wiegand Card type: Mifare 1 card Operating Voltage Range: 9 ? 16 VDC Operating Temperature: -40癈 to 70癈. Reader consumption: Standby: 85mA / Read: 100mA Indicator: Built-in audible buzzer indicates card reading, bicolor LED indicates access Keypad: with Weather resistant: yes