Quantity: Package contains 1pcs handheld 125KHz RFID writer and 10 pcs T5577 black keyfobs. The operating frequency of the machine is 125KHz. Please understand which frequency machine you need before purchasing. If you are unsure, please contact us before purchasing There are only two buttons for reading and writing, which are easy to operate and do not require connection to a computer.The 125KHz handheld RFID writer needs to be fitted with 2 x 1.5V AAA batteries before use, note: batteries need to be purchased separately. Note: The 10pcs T5577 keyfobs included in the package are the default blank command product, to test read/write, use a handheld reader to read the card and write it to a blank keyfob.Can be reused, proximity cards can use an unlimited number of times Please ensure that the 125KHz handheld RFID writer supports the type of keyfobs (cards) and protocol you are using,125KHz handheld duplicator support writing T5577, EM4305, CET5200 and all the T5577, EM4305 compatible cards, can be duplicated 20,000 times, the keychains and cards reading and writing distance of 2.5 to 6cm. The RFID ID Card Copier can be widely used in places that require security monitoring or access control support, such as homes, communities, schools, offices, hotels, elevators,parking cards, access cards, etc Color: As Shown Material: Metal+Plastic Package Contents: 1*set rfid copier