Main technical parametersIC chips: EM4200, TK4100, M1S50/S70,FM11RF08,Alien H4,etc.Operating frequency: LF 125KHz/HF 13.56MHzReading and writing distance: 2.5~10cmReading and writing time: 1-2msErase life: > 100,000 timesWorking temperature: -20℃~+85℃Data preservation: >10 yearsMaterial: PVC or acrylic, epoxy resin glueOverall dimensions: φ25/30/32mm, 20× 25mm, 22× 22mm, 30× 30mm, etc., which can be customized