Quick Details Special Features: Waterproof / Weatherproof Communication Interface: Ibutton Customized support: Customized logo Place of Origin: Guangdong, China Brand Name: SMARTWAY Chip: TM1990A-F5 Holder Color: black, blue,red, green, yellow, .. Protocol: one wire Storage capacity: 64 bits ROM Material: 304 Stainless Steel+chip+plastic Chip Size: 16.25*5.89mm Weight: 4.7g Printing: Laser Printing Application: access control,fleet manage,driver id,lock Operating Range: 2.8V to 6.0V, -40C to +85C