... 56MhzReading range: up to 10cmMaterial:PVC/ABS/PET/PS/anti-metal absorbing materialAvailable Sizes (mm) 85.5*54 ... , 70*40, 73*23, 50*50, 45*45, 43*26, 36*20, 35*35, 30*15, ... 32*27, 19*35,25*25, φ25, φ30, φ45, φ50mm, etc.Working EnvironmentWorking life: 5-10 years Store ... numbershole punched etc.Optional Technique-Special function option Anti-metal layer-Custom logos/artworks printing/ Laser engrave ...