Key chain card, from the refined product shell mold, advanced anti-corrosion high temperature materials injection pressure, internal RF card chip package, by filling an epoxy resin, a combination of ultrasonic welding. Chip: can be packaged FM1108, S50, S70, EK4100, EM4100, T5577, etc. Materials: Plastic housing characteristics: ① small and exquisite appearance, durable, do not fade. ② product waterproof, shockproof, anti-corrosion. ③ be channeling hung on the key ring for easy carrying. ④ a variety of styles and colors to choose from. ⑤ exterior design provides customers. ⑥125Khz / 13.56Mhz can demand a variety of chip package, a composite package. ⑦ can be sprayed ID code, serial number. ⑧ Operating temperature: -20-60 ° C