This item S6-R is a Wiegand slave reader, not a (Standalone) machine, it required a controller to manage it by wiegand protocol (D0 D1) 26-37 The S6-R (MF) reader is a metal case anti- proximity reader. Because of waterproof, it can be mounted either indoor or outdoor in harsh environments. Metal Case, anti- Waterproof, conforms to IP66 Wiegand 26-37 bits output (default: 26bits) Card type: card External LED Control & External Buzzer Control Operating Voltage:9-24V DC Reading Distance:3-8 CM Output Format:Wiegand 26 bits(26-37 bits available upon request) Operating Temperature:-40-60(-40-140) Standby Current: Less than 25mA Operating Humidity:10%-98% RH Index of Protection:IP66 Dimensions:L103L x W48W x H19 (mm) Specification:125Khz ID Color:As Shown Material:Zinc alloy Package Contents: 1 * S6R IP66 Waterproof Metal Access Control 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.