* The contact-less Key Tag is available with different ICs in the housing or intelligent building, such as EM, MF, TEMIC, ATMEL, ST, TK. * Material used is ABS. * Available with yellow, semi-transparent blue, semi-transparent red, (other colors available if 4000pcs above). * Silk-screen printability with logo or numbering. * Water and dust proof, anti-shock. * Operating Temperature: -10~+50 Celsius degree.