SK4-R Mifare
Wiegand Reader (Mifare)
> Metal Case, anti-vandal
> Waterproof, conform to IP66
> Card Type: 13.56MHz Mifare Cards/Fobs 
> Wiegand Format: Wiegand 26 default (26~37 available upon request)
> Keypad Transmission: 4 bits (8bits or virtual card number format are available upon request)
> Working temperature:-40 °C ~ 60 °C
> Reading range: 3 ~ 5 cm

SK4-R IC is of digital backlit, supports to read 13.56MHz cards.
It is a metal case, Wiegand output keypad, with integrated proximity reader.
Because of waterproof, it can be mounted either indoor or outdoor in harsh environments.