B-safe® Hard Tags, which are made by high-quality materials, excel for high Q-factor value, strong radio signal and durability. 3 kinds of lock systems are provided by B-safe®: standard, strong and B-safe®. We also provide different frequencies: 58KHz & 8.2 KHz. The various color includes white, black, gray and so on. And we also accept the order of customized production to meet the requirements of customers.