UHPPOTE Micro Small 125KHz RFID EM ID Proximity Induction Token Tag Size 6(D) x26(L) mm/0.24x1.02in for Patrol (pack of 10) Operation frequency: 125Khz / Standad EM ID (Read only, Not HID or IC tag) Compatible with all 125KHz ID reader to gain access and the animal identification Detecting distance: 0-5cm / 0-1.97in Each tag pre-programmed with unique ID but not print on the case Waterproof performance: Waterproof