Features: Suitable for access control. High reliablity and high security. Quick response Wide color selection. Customize serial number per your requirement. Read only, otp, programable. Specifications: Card read distance: 0-10 cm Chip: em4100, t5577 Working temperature: -10 ~ 70? Storge temperature:-20~80? Wide rel. Humdity range : 10 to 90 % Material: abs